Information transmission method and apparatus

ABSTRACT

Disclosed is an information transmission method. The method includes that: a first communication node determines a resource or parameter for a second communication node to transmit a reference signal, and indicates the resource or parameter to the second communication node through signaling; and the second communication node receives the signaling transmitted by the first communication node, determines the resource or parameter for transmitting the reference signal based on the signaling or based on the signaling and a rule predefined by the first communication node and the second communication node, and uses the determined resource or parameter to transmit the reference signal.

CROSS REFERENCE TO RELATED APPLICATIONS

This patent document is a continuation of and claims priority toInternational Patent Application No. PCT/CN2018/101813, filed on Aug.22, 2018, which claims the benefit of priority of Chinese PatentApplication No. 201710939835.7, filed Sep. 30, 2017. The entire contentsof the before-mentioned patent applications are incorporated byreference as part of the disclosure of this application.

TECHNICAL FIELD

The present disclosure relates to, but is not limited to, the field ofcommunications.

BACKGROUND

In Long Term Evolution (LTE for short), a physical downlink controlchannel (PDCCH for short) is used for bearing uplink and downlinkscheduling information and uplink power control information. Thedownlink control information (DCI for short) formats includes DCIformats 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, etc. And later DCI formats2B, 2C, and 2D are added to an evolved LTE-A Release 12 to support avariety of different applications and transmission modes. A base station(e-Node-B, eNB for short) may configure a user equipment (UE for short)through the downlink control information, or the UE is configured by thehigh-layer, which is also referred to as being configured with thehigh-layer signaling.

A sounding reference signal (SRS for short) is a signal used between theUE and the eNB for measuring radio channel state information (CSI forshort). In the LTE system, the UE periodically transmits an uplink SRSon the last data symbol of a transmission subframe according toparameters, indicated by the eNB, such as a frequency band, a frequencydomain position, a sequence cyclic shift, a period, and a subframeoffset. The eNB determines the uplink CSI of the UE according to thereceived SRS, and performs operations such as frequency domain selectionscheduling, closed loop power control according to the obtained CSI.

In a study of LTE-A Release 10 (LTE-A Release 10), it is proposed thatin uplink communication, a non-precoded SRS, that is, anantenna-specific SRS should be used, while a demodulation referencesignal (DMRS for short) used for demodulation in a physical uplinkshared channel (PUSCH for short) is precoded. The eNB can estimateoriginal uplink CSI by receiving the non-precoded SRS, while can notestimate the original uplink CSI through the precoded DMRS. At thistime, when the UE transmits the non-precoded SRS by using multipleantennas, more SRS resources are required by each UE, which results in adecrease in the number of UEs that can be simultaneously reused in thesystem. The UE can transmit the SRS in two triggering manners, that is,through the high-layer signaling (also referred to as the trigger type0) or the downlink control information (also referred to as the triggertype 1). A periodic SRS is triggered based on the high-layer signaling,and a non-periodic SRS is triggered based on the downlink controlinformation. In LTE-A Release 10, a manner of a non-periodictransmission of SRS is added, which improves the utilization rate of SRSresources to some extent and improves the flexibility of resourcescheduling.

With the development of communication technologies, the demand for dataservices is increasing and available low-frequency carriers are in shortsupply. Therefore, high-frequency (30 GHz to 300 GHz) carriercommunication which has not been fully utilized has become an importantcommunication way of achieving high-speed data communication in thefuture. The high-frequency carrier communication has a large availablebandwidth and can provide effective high-speed data communication.However, a big technical challenge for the high-frequency carriercommunication is that high-frequency signals are attenuatedsignificantly in space compared with low-frequency signals. Althoughthis will cause spatial attenuation losses when the high-frequencysignals are used for outdoor communication, the shorter wavelength ofthe high-frequency signals usually allows using more antennas.Therefore, the communication is implemented based on beams to compensatethe spatial attenuation losses.

However, when the number of antennas increases, each antenna needs a setof radio frequency links, and digital beamforming thus brings about anincrease in costs and a loss in power. Therefore, current studies tendto hybrid beamforming, that is, a final beam formed by radio frequencybeams together with digital beams.

In a study of the new radio access technology (NR for short), for thehigh-frequency communication system, the eNB is configured with a largenumber of antennas to form downlink transmission beams for compensatingthe spatial attenuation of the high-frequency communication, and the UEis also configured with a large number of antennas to form uplinktransmission beams. At this time, the SRS is also transmitted in theform of a beam. In a future study of the new radio access technology,the eNB may configure different bandwidth parts (BWP for short) for eachuser, and the bandwidth occupied by the BWP of a user may be larger thanthe 20 MHz bandwidth of the LTE or LTE-A system. The current SRSbandwidth configuration only supports 20 MHz at most, which cannot meetthe design requirements of NR. In addition, how to determine a frequencydomain starting position of the SRS and how to achieve an antennaswitching of the SRS are also problems to be solved in the SRS design ofNR.

SUMMARY

The following is a summary of the subject matter described herein indetail. This summary is not intended to limit the scope of the claims.

Embodiments of the present application provide an informationtransmission method and apparatus for implementing configuration of areference signal transmission in a NR system.

In a first aspect, an embodiment of the present application provides aninformation transmission method, including:

determining, by a first communication node, a resource or parameter fora second communication node to transmit a reference signal; and

indicating the resource or parameter to the second communication nodethrough signaling.

In a second aspect, an embodiment of the present application provides aninformation transmission method, including:

receiving, by a second communication node, signaling transmitted by afirst communication node;

determining, a resource or parameter for transmitting a reference signalbased on the signaling or based on the signaling and a rule predefinedby the first communication node and the second communication node; and

using the resource or parameter to transmit the reference signal.

In a third aspect, an embodiment of the present application provides aninformation transmission method, including:

determining, by a first communication node, a first-level parameter anda second-level parameter of a reference signal resource, where thefirst-level parameter includes at least one of: the number N1 of timedomain symbols continuously transmitted by a reference signal in a samefrequency domain unit, an antenna switching switch function A1 of thereference signal, or a frequency hopping switch function B1; and thesecond-level parameter includes at least one of: the number N2 of timedomain symbols continuously transmitted by an antenna port group of thereference signal, an antenna switching switch function A2 of thereference signal in a time domain unit, or a frequency hopping switchfunction B2 of the reference signal in a time domain unit; and

receiving, by the first communication node, the reference signalaccording to the first-level parameter and the second-level parameter.

In a fourth aspect, an embodiment of the present application provides aninformation transmission method, including:

determining, by a second communication node, a first-level parameter anda second-level parameter of a reference signal resource, where thefirst-level parameter includes at least one of: the number N1 of timedomain symbols continuously transmitted by a reference signal in a samefrequency domain unit, an antenna switching switch function A1 of thereference signal, or a frequency hopping switch function B1; and thesecond-level parameter includes at least one of: the number N2 of timedomain symbols continuously transmitted by an antenna port group of thereference signal, an antenna switching switch function A2 of thereference signal in a time domain unit, or a frequency hopping switchfunction B2 of the reference signal in a time domain unit; and

transmitting, by the second communication node, the reference signalaccording to the first-level parameter and the second-level parameter.

In a fifth aspect, an embodiment of the present application provides aninformation transmission apparatus, applied to a first communicationnode, including:

a first processing module, which is configured to determine a resourceor parameter for a second communication node to transmit a referencesignal; and

a first transmitting module, which is configured to indicate theresource or parameter to the second communication node throughsignaling.

In a sixth aspect, an embodiment of the present application provides aninformation transmission apparatus, applied to a second communicationnode, including:

a first receiving module, which is configured to receive signalingtransmitted by a first communication node;

a second processing module, which is configured to determine a resourceor parameter for transmitting a reference signal based on the signalingor based on the signaling and a rule predefined by the firstcommunication node and the second processing module; and

a second transmitting module, which is configured to use the resource orparameter to transmit the reference signal.

In a seventh aspect, an embodiment of the present application providesan information transmission apparatus, applied to a first communicationnode, including:

a third processing module, which is configured to determine afirst-level parameter and a second-level parameter of a reference signalresource, where the first-level parameter includes at least one of: thenumber N1 of time domain symbols continuously transmitted by a referencesignal in a same frequency domain unit, an antenna switching switchfunction A1 of the reference signal, or a frequency hopping switchfunction B1; and the second-level parameter includes at least one of:the number N2 of time domain symbols continuously transmitted by anantenna port group of the reference signal, an antenna switching switchfunction A2 of the reference signal in a time domain unit, or afrequency hopping switch function B2 of the reference signal in a timedomain unit; and

a second receiving module, which is configured to receive the referencesignal according to the first-level parameter and the second-levelparameter.

In an eighth aspect, an embodiment of the present application providesan information transmission apparatus, applied to a second communicationnode, including:

a fourth processing module, which is configured to determine afirst-level parameter and a second-level parameter of a reference signalresource, where the first-level parameter includes at least one of: thenumber N1 of time domain symbols continuously transmitted by a referencesignal in a same frequency domain unit, an antenna switching switchfunction A1 of the reference signal, or a frequency hopping switchfunction B1; and the second-level parameter includes at least one of:the number N2 of time domain symbols continuously transmitted by anantenna port group of the reference signal, an antenna switching switchfunction A2 of the reference signal in a time domain unit, or afrequency hopping switch function B2 of the reference signal in a timedomain unit; and

a third transmitting module, which is configured to transmit thereference signal according to the first-level parameter and thesecond-level parameter.

In a ninth aspect, an embodiment of the present application provides acommunication node, including: a first memory and a first processor,where the first memory is configured to store information transmissionprograms which, when executed by the first processor, implement thesteps of the information transmission method described in the firstaspect.

In a tenth aspect, an embodiment of the present application provides acommunication node, including: a second memory and a second processor,where the second memory is configured to store information transmissionprograms which, when executed by the second processor, implement thesteps of the information transmission method described in the secondaspect.

In an eleventh aspect, an embodiment of the present application providesa communication node, including: a third memory and a third processor,where the third memory is configured to store information transmissionprograms which, when executed by the third processor, implement thesteps of the information transmission method described in the thirdaspect.

In a twelfth aspect, an embodiment of the present application provides acommunication node, including: a fourth memory and a fourth processor,where the fourth memory is configured to store information transmissionprograms which, when executed by the fourth processor, implement thesteps of the information transmission method described in the fourthaspect.

In addition, an embodiment of the present application further provides acomputer-readable medium, which is configured to store informationtransmission programs which, when executed by a processor, implement thesteps of the information transmission method described in any one of thefirst to the fourth aspect.

In the embodiment of the present application, a first communication nodedetermines a resource or parameter for a second communication node totransmit a reference signal, and indicates the resource or parameter tothe second communication node through signaling. The secondcommunication node receives the signaling transmitted by the firstcommunication node, and determines the resource or parameter fortransmitting the reference signal based on the signaling or based on thesignaling and a rule predefined by the first communication node and thesecond communication node. In this way, design requirements for thereference signal transmission in the NR system are achieved.

In the embodiment of the present application, the first communicationnode receives the reference signal according to the parameters of twolevels of the reference signal resource, and the second communicationnode transmits the reference signal according to the parameters of twolevels of the reference signal resource. Through the configuration ofparameters of two levels, the antenna switching and frequency hoppingcontrol of the reference signal in the NR system are achieved.

Other aspects can be understood after the drawings and detaileddescription are read and understood.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a flowchart of an information transmission method according toan embodiment of the present application;

FIG. 2 is a flowchart of another information transmission methodaccording to an embodiment of the present application;

FIG. 3 is a flowchart of another information transmission methodaccording to an embodiment of the present application;

FIG. 4 is a flowchart of another information transmission methodaccording to an embodiment of the present application;

FIG. 5 is a schematic diagram 1 of a multi-level bandwidth structurecorresponding to a reference signal according to an embodiment of thepresent application;

FIG. 6 is a schematic diagram 2 of a multi-level bandwidth structurecorresponding to a reference signal according to an embodiment of thepresent application;

FIGS. 7 (a) to 7 (f) are schematic diagrams showing frequency domainoccupancy of PUCCHs on different time domain symbols;

FIGS. 8 (a) to 8 (j) are schematic diagrams of an example 7 of thepresent application;

FIG. 9 is a schematic diagram of an information transmission apparatusaccording to an embodiment of the present application;

FIG. 10 is a schematic diagram of another information transmissionapparatus according to an embodiment of the present application;

FIG. 11 is a schematic diagram of another information transmissionapparatus according to an embodiment of the present application;

FIG. 12 is a schematic diagram of another information transmissionapparatus according to an embodiment of the present application;

FIG. 13 is a schematic diagram of a communication node according to anembodiment of the present application; and

FIG. 14 is a schematic diagram of another communication node accordingto an embodiment of the present application.

DETAILED DESCRIPTION

Embodiments of the present application will be described in detail inconjunction with the drawings, and it should be understood that theembodiments described hereinafter are intended to describe and explainthe present application and not to limit the present application.

The steps illustrated in the flowcharts of the drawings may be executedby, for example, a set of computer-executable instructions in a computersystem. Although the flowcharts illustrate a logical order of execution,the steps illustrated or described may, in some cases, be executed in adifferent order from the one illustrated or described herein.

FIG. 1 is a flowchart of an information transmission method according toan embodiment of the present application. As illustrated in FIG. 1, theinformation transmission method in the embodiment may include the stepsdescribed below.

In S101, a first communication node determines a resource or parameterfor a second communication node to transmit a reference signal.

In S102, the resource or parameter is indicated to the secondcommunication node through signaling.

In the embodiment, the first communication node refers to a nodeconfigured to determine a transmission mode of the second communicationnode and to perform signaling indication to the second communicationnode, and the second communication node refers to a node configured toreceive the signaling. In an implementation mode, the firstcommunication node may be nodes such as a base station of a macro cell,a base station or transmission node of a small cell, a sending node in ahigh-frequency communication system, or a sending node in an Internet ofThings system, and the second communication node may be nodes in acommunication system such as a UE, a mobile phone, a portable device, ora car. In another implementation mode, the base station of a macro cell,the base station or transmission node of a small cell, the sending nodein a high-frequency communication system, the sending node in anInternet of Things system, or the like may serve as the secondcommunication node, and the UE may serve as the first communicationnode.

In the embodiment, the signaling may include at least one of: radioresource control (RRC) signaling, media access control control element(MAC CE) signaling, physical downlink control signaling, or physicallayer dynamic control signaling.

In the embodiment, the reference signal includes one of: a SRS, anuplink demodulation reference signal, a downlink demodulation referencesignal, a downlink channel state information reference signal (CSI-RS),an uplink phase tracking reference signal (PTRS), and a downlink PTRS.

In the embodiment, N_(BWP) is the bandwidth value of the bandwidth part.N_(BWP) ^(UL) refers to an uplink bandwidth part, and N_(BWP) ^(DL)refers to a downlink bandwidth part.

In an exemplary implementation mode, the resource or parameter at leastincludes one or more of: a frequency domain starting position, afrequency domain end position, a transmission bandwidth, a number ofsegments, a bandwidth configuration index, a bandwidth parameter, aparameter indicating whether a resource is repeated or the same, anantenna port number or index, a calculation manner of a frequency domainstarting position of a maximum bandwidth of the reference signal in amulti-level bandwidth structure, a parameter related to obtaining thefrequency domain starting position of the maximum bandwidth of thereference signal in the multi-level bandwidth structure, or informationof the multi-level bandwidth structure containing the reference signal.

In the embodiment, the number of segments has the same meaning as N₀,N₁, N₂, N₃ in the bandwidth configuration table 4a in LTE, or the numberof segments may be defined as a ratio of a transmission bandwidth of aprevious level to a transmission bandwidth of a current level in thetree structure bandwidth configuration of the reference signal.

In the embodiment, the reference signal may be transmitted in at leastone of the following manners: a transmission beam, a transmissionantenna, a transmission sector, a transmitting end precoding, an antennaport indication, an antenna weight vector indication, an antenna weightmatrix indication, a space-division multiplexing mode, a frequencydomain/time domain transmission diversity mode, a transmission sequence,the number of transmission layers, a transmission model, a modulationand coding mode, or a reference signal indication.

In the embodiment, the reference signal may be received in at least oneof the following manners: a receiving beam; a receiving antenna; areceiving antenna panel; a receiving sector; a first beam resourcecorresponding manner, where the first beam resource is a beam resource,of the first communication node, indicated in a Quasi-Co-Location (QCL)of both the reference signal and an antenna port; or a second beamresource corresponding manner, where the second beam resource is a beamresource, of the first communication node, indicated in a QCL of both abase reference signal and the antenna port.

In an exemplary implementation mode, the step in which a firstcommunication node determines a resource or parameter for a secondcommunication node to transmit a reference signal may include that: thefirst communication node determines the resource or parameter for thesecond communication node to transmit the reference signal based on arule predefined by the first communication node and the secondcommunication node.

In an exemplary implementation mode, the step in which a firstcommunication node determines a resource or parameter for a secondcommunication node to transmit a reference signal includes at least oneof the steps described below.

The first communication node determines a bandwidth configuration indexactually used by the second communication node according to at least oneof a bandwidth value or the bandwidth configuration index of a bandwidthpart configured for the second communication node.

The first communication node determines a transmission bandwidth set ofthe reference signal according to the bandwidth configuration index ofthe reference signal.

The first communication node determines the transmission bandwidth orthe number of segments of the reference signal according to at least oneof the bandwidth value, the bandwidth configuration index or thebandwidth parameter of the bandwidth part configured for the secondcommunication node.

In an exemplary implementation mode, the step in which the firstcommunication node determines a bandwidth configuration index actuallyused by the second communication node according to at least one of abandwidth value or the bandwidth configuration index of a bandwidth partconfigured for the second communication node includes the step describedbelow.

Determining the bandwidth configuration index actually used by thesecond communication node includes at least one of:

${{(1)\mspace{14mu} 4 \times \left\lfloor \frac{N_{BWP}}{4} \right\rfloor} - C_{SRS}};$${{(2)\mspace{14mu} 8 \times \left\lfloor \frac{N_{BWP}}{8} \right\rfloor} - C_{SRS}};$${{(3)\mspace{14mu} 12 \times \left\lfloor \frac{N_{BWP}}{12} \right\rfloor} - C_{SRS}};$${{(4)\mspace{14mu} 16 \times \left\lfloor \frac{N_{BWP}}{16} \right\rfloor} - C_{SRS}};$or

(5) when a maximum transmission bandwidth of the reference signalcorresponding to the bandwidth configuration index is less than or equalto

${4 \times \left\lfloor \frac{N_{BWP}}{4} \right\rfloor\mspace{14mu}{or}\mspace{20mu} 8 \times \left\lfloor \frac{N_{BWP}}{8} \right\rfloor\mspace{14mu}{or}}\;$${12 \times \left\lfloor \frac{N_{BWP}}{12} \right\rfloor\mspace{14mu}{or}\mspace{20mu} 16 \times \left\lfloor \frac{N_{BWP}}{16} \right\rfloor}\;,$selecting a maximum bandwidth configuration index and subtracting themaximum bandwidth configuration index by C_(SRS) to obtain as thebandwidth configuration index actually used by the second communicationnode.

└ ┘ is a round-down function, N_(BWP) is the bandwidth value of thebandwidth part, C_(SRS) is the bandwidth configuration index, and thefirst communication node configures C_(SRS) and N_(BWP) for the secondcommunication node through the signaling.

In an exemplary implementation mode, the step in which the firstcommunication node determines a transmission bandwidth set of thereference signal according to the bandwidth configuration index of thereference signal includes the step described below.

When the bandwidth configuration index of the reference signal isgreater than or equal to 17, or the bandwidth configuration index of thereference signal is less than or equal to 14, or the bandwidthconfiguration index of the reference signal is an integer included in arange from 0 to 31 or from 0 to 63, determining the transmissionbandwidth set includes at least one of:

(1) 108, 36, 12, 4;

(2) 112, 56, 28, 4;

(3) 112, 56, 8, 4;

(4) 120, 60, 20, 4;

(5) 120, 40, 20, 4;

(6) 128, 64, 32, 4;

(7) 128, 32, 16, 4;

(8) 128, 32, 8, 4;

(9) 136, 68, 4, 4;

(10) 144, 72, 24, 4;

(11) 144, 72, 36, 4;

(12) 144, 72, 12, 4;

(13) 144, 48, 24, 4;

(14) 144, 48, 12, 4;

(15) 144, 48, 16, 4;

(16) 144, 48, 8, 4;

(17) 160, 80, 40, 4;

(18) 160, 80, 20, 4;

(19) 160, 40, 20, 4;

(20) 160, 40, 8, 4;

(21) 168, 84, 28, 4;

(22) 176, 88, 44, 4;

(23) 180, 60, 20, 4;

(24) 192, 96, 32, 4;

(25) 192, 96, 48, 4;

(26) 192, 48, 24, 4;

(27) 192, 48, 16, 4;

(28) 192, 48, 12, 4;

(29) 200, 100, 20, 4;

(30) 200, 40, 20, 4;

(31) 200, 40, 8, 4;

(32) 208, 104, 52, 4;

(33) 216, 108, 36, 4;

(34) 240, 120, 60, 4;

(35) 240, 120, 40, 4;

(36) 240, 120, 20, 4;

(37) 240, 80, 40, 4;

(38) 240, 80, 20, 4;

(39) 240, 80, 8, 4;

(40) 256, 128, 64, 4;

(41) 256, 64, 32, 4;

(42) 256, 64, 16, 4;

(43) 256, 64, 8, 4; or

(44) 272, 136, 68, 4.

In an exemplary implementation mode, the step in which the firstcommunication node determines the transmission bandwidth or the numberof segments of the reference signal according to at least one of thebandwidth value, the bandwidth configuration index or the bandwidthparameter of the bandwidth part configured for the second communicationnode is performed in at least one of the following manners, or atransmission bandwidth set corresponding to one or more bandwidthconfiguration indexes satisfies one of the following relationships:

Manner 1:

${{{Let}\mspace{14mu} k_{i}} = {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)\text{/}4}{2^{i}} \right)}},$then the transmission bandwidth is:

  m_(SRS, 0) = 4 × k₀; $m_{{SRS},{i + 1}} = \left\{ \begin{matrix}{{4 \times k_{i + 1}},} & {{{if}\mspace{14mu}\left( {\left( {N_{BWP} - {4 \times C_{SRS}}} \right)/4} \right){mod}\; 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{4,} & {{otherwise}.}\end{matrix} \right.$

Manner 2:

${{{Let}\mspace{14mu} k_{i}} = {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)\text{/}4}{2^{i}} \right)}},$then the transmission bandwidth is:

  m_(SRS, 0) = 4 × k₀; $m_{{SRS},{i + 1}} = \left\{ \begin{matrix}{{4 \times k_{i + 1}},} & {{{if}\mspace{14mu}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)}{4} \right){mod}\; 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{4,} & {{otherwise}.}\end{matrix} \right.$

Manner 3:

The number of segments is:

N₀ = 1; $N_{i + 1} = \left\{ \begin{matrix}{2,} & {{{if}\mspace{14mu}\left( {\left( {N_{BWP} - {4 \times C_{SRS}}} \right)/4} \right){mod}\; 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{k_{i},} & {{{if}\mspace{14mu}\left( {\left( {N_{BWP} - {4 \times C_{SRS}}} \right)/4} \right){mod}\; 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Odd}}} \\{1,} & {{otherwise}.}\end{matrix} \right.$

Manner 4:

The transmission bandwidth is

${m_{{SRS},i} = {4 \times {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)\text{/}4}{2^{i} \times 3^{i} \times 5^{i}} \right)}}};{or}$$k_{i} = {4 \times {{{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)\text{/}4}{2^{i} \times 3^{i} \times 5^{i}} \right)}.}}$

Manner 5:

The transmission bandwidth is

$m_{{SRS},i} = \left\{ {\begin{matrix}{{16 \times \left\lfloor {\left( {N_{BWP} - {16 \times C_{SRS}}} \right)\text{/}16} \right\rfloor\text{/}2^{i}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix};{{{or}m_{{SRS},i}} = \left\{ {\begin{matrix}{{16 \times \left\lfloor {\left( {N_{BWP} + {16 \times C_{SRS}}} \right)\text{/}16} \right\rfloor\text{/}2^{i}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix}.} \right.}} \right.$

Manner 6:

The transmission bandwidth is

$m_{{SRS},i} = \left\{ {\begin{matrix}{{16 \times \left\lfloor {\left( {N_{BWP} - {16 \times C_{SRS}}} \right)\text{/}16} \right\rfloor\text{/}d_{i}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix};{{{or}m_{{SRS},i}} = \left\{ {\begin{matrix}{{16 \times \left\lfloor {\left( {N_{BWP} + {16 \times C_{SRS}}} \right)\text{/}16} \right\rfloor\text{/}d_{i}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix}.} \right.}} \right.$d_(i) is 2^(i)×3^(j)×5^(l), or d_(i) is one or more integers in a rangefrom 1 to 17, including 1 and 17, values of i, j and l are non-negativeintegers, m_(SRS,i) is the transmission bandwidth of the referencesignal, floor( ) is a round-down function, └ ┘ is a round-down function,i=B_(SRS), B_(SRS) is the bandwidth parameter of the reference signal,N_(BWP) is the bandwidth value of the bandwidth part, and the firstcommunication node configures B_(SRS) and N_(BWP) for the secondcommunication node through the signaling.

In an exemplary implementation mode, indicating the resource orparameter for the second communication node through signaling includesthe step described below.

An offset value of a frequency domain starting position corresponding toa maximum bandwidth in a multi-level bandwidth structure containing thereference signal relative to a first frequency domain starting positionis indicated to the second communication node through the signaling,where the first frequency domain starting position is obtained by thesecond communication node based on a rule predefined by the firstcommunication node and the second communication node.

In an exemplary implementation mode, the calculation manner of afrequency domain starting position of a maximum bandwidth of thereference signal in a multi-level bandwidth structure includes at leastone of:

(1) k ₀ ^((p))=(└N_(RB) ^(UL)/2┘−m_(SRS,0)/2−Δ_(offset) ^(PRB))N_(SC)^(RB)+k_(TC) ^((p)), where the first frequency domain starting positionis: k ₁ ^((p))=(└N_(RB) ^(UL)/2┘−m_(SRS,0)/2)N_(SC) ^(RB)+k_(TC) ^((p));

(2) k ₀ ^((p))=(└N_(RB) ^(UL)−m_(SRS,0) ^(max)−Δ_(offset) ^(PRB))N_(sc)^(RB)+k_(TC) ^((p)), where the first frequency domain starting positionis:

k ₁ ^((p))=(└N_(RB) ^(UL)−m_(SRS,0) ^(max))N_(sc) ^(RB)+k_(TC) ^((p));or

(3) k ₀ ^((p))=k_(TC) ^((p))+Δ_(offset) ^(PRB)N_(sc) ^(RB), where thefirst frequency domain starting position is: k ₁ ^((p))=k_(TC) ^((p)).

Δ_(offset) ^(PRB) is the offset value of the frequency domain startposition corresponding to the maximum bandwidth in the multi-levelbandwidth structure containing the reference signal relative to thefirst frequency domain start position and is an integer in units ofN_(SC) ^(RB), N_(RB) ^(UL) represents the bandwidth part, m_(SRS,0) islength information of a frequency domain bandwidth corresponding to themaximum bandwidth in the multi-level bandwidth structure, k_(TC) ^((p))represents an offset quantity of the maximum bandwidth within a unitN_(SC) ^(RB), p is a port index, and m_(SRS,0) ^(max) is lengthinformation of a maximum bandwidth in one or more multi-level bandwidthstructures.

In an exemplary implementation mode, the calculation manner of afrequency domain starting position of a maximum bandwidth of thereference signal in a multi-level bandwidth structure includes one of:

${{(1)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = K_{TC}^{(p)}};$${{(2)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor \frac{N_{RB}^{UL}}{2} \right\rfloor - {m_{{SRS},b}\Pi_{b^{\prime} = 0}^{B_{SRS}}\frac{N_{b^{\prime}}}{2}}} \right)N_{SC}^{RB}} + K_{TC}^{(p)}}};$${{(3)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {N_{RB}^{UL} - {m_{{SRS},b}\Pi_{b^{\prime} = 0}^{B_{SRS}}N_{b^{\prime}}}} \right)N_{SC}^{RB}} + K_{TC}^{(p)}}};$${{(4)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor \frac{N_{RB}^{UL}}{2} \right\rfloor - {m_{{SRS},0}\text{/}2} - \Delta_{offset}^{PRB}} \right)N_{SC}^{RB}} + k_{TC}^{(p)}}};$${{(5)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {N_{RB}^{UL} - m_{{SRS},0}^{\max}} \right)N_{sc}^{RB}} + k_{TC}^{(p)}}};$${{(6)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor {N_{RB}^{UL}\text{/}2} \right\rfloor - {m_{{SRS},0}\text{/}2}} \right)N_{SC}^{RB}} + k_{TC}^{(p)}}};$${{(7)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {N_{RB}^{UL} - m_{{SRS},0}^{\max} - \Delta_{offset}^{PRB}} \right)N_{sc}^{RB}} + k_{TC}^{(p)}}};{{{{or}(8)}\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {k_{TC}^{(p)} + {\Delta_{offset}^{PRB}N_{sc}^{RB}}}};$

Δ_(offset) ^(PRB) is an offset value and an integer in units of N_(SC)^(RB), N_(RB) ^(UL) represents the bandwidth part, m_(SRS,0) is lengthinformation of a frequency domain bandwidth corresponding to the maximumbandwidth in the multi-level bandwidth structure, k_(TC) ^((p))represents an offset quantity of the maximum bandwidth within a unitN_(SC) ^(RB), p is a port index, and B_(SRS) is level information of abandwidth, in the multi-level bandwidth structure, of the referencesignal on one frequency domain symbol; and N_(b′) is the number ofbandwidths, of a b'th level, included in one bandwidth of a (b′−1)thlevel, and m_(SRS,0) ^(max) is length information of a maximum bandwidthin one or more multi-level bandwidth structures.

In an exemplary implementation mode, one bandwidth of bandwidths of abth level in the multi-level structure containing the reference signalincludes one or more bandwidths of a (b+1)th level, where b is anon-negative integer.

In an exemplary implementation mode, the parameter or a configurationrange of the parameter is obtained according to position information ofa time domain symbol in one time unit; or a reference signal resource islocated on different time domain symbols in one time unit, and theparameter or the configuration range of the parameter is different.

In an exemplary implementation mode, the antenna port number or indexremains unchanged on M consecutive time domain symbols, where M is aninteger greater than 0.

In an exemplary implementation mode, when a plurality of resources areindicated through the signaling, configuration values or parametervalues of the plurality of resources are the same on L consecutive timedomain symbols, or configuration values or parameter values of theplurality of resources are different on L consecutive time domainsymbols, where L is an integer greater than 0.

In an exemplary implementation mode, when a plurality of resources areindicated through the signaling, the plurality of resources constitute aresource set or a resource group, and a parameter of the resource set orthe resource group is configured to indicate whether the plurality ofresources in the resource set or the resource group are the same orrepeated.

In an exemplary implementation mode, when the parameter indicatingwhether a resource is repeated or the same has a value of 1 or the stateis on, the parameter indicating whether a resource is repeated or thesame indicates that all parameter configuration values of a plurality ofSRS resources in a resource set or a resource group are the same, orthat parameter values used for representing transmission beams orantenna ports or frequency domain resources in the plurality of SRSresources are the same, or that the plurality of SRS resources use asame transmission beam or antenna port or frequency domain resource.

In an exemplary implementation mode, a plurality of the resources areconfigured to implement at least one function of a group consisting of:

switching of antennas or transmission ports of a reference signal;

transmitting of a reference signal on a plurality of time domainresources in a same transmission manner or at a same frequency domainposition; and

reception on the first communication node of a reference signaltransmitted from the second communication node on a plurality of timedomain resources in a same receiving manner.

In an exemplary implementation mode, the number of segmentsN_(i)<=N_(j), where <=represents less than or equal to; and i<j.

FIG. 2 is a flowchart of an information transmission method according toan embodiment of the present application. As illustrated in FIG. 2, theinformation transmission method in the embodiment may include the stepsdescribed below.

In S201, a second communication node receives signaling transmitted by afirst communication node.

In S202, a resource or parameter for transmitting a reference signal isdetermined based on the signaling or based on the signaling and a rulepredefined by the first communication node and the second communicationnode.

In S203, the resource or parameter is used to transmit the referencesignal.

In the embodiment, the first communication node refers to a nodeconfigured to determine a transmission mode of the second communicationnode and to perform signaling indication to the second communicationnode, and the second communication node refers to a node configured toreceive the signaling. In an implementation mode, the firstcommunication node may be nodes such as a base station of a macro cell,a base station or transmission node of a small cell, a sending node in ahigh-frequency communication system, or a sending node in an Internet ofThings system, and the second communication node may be nodes in acommunication system such as a UE, a mobile phone, a portable device, ora car. In another implementation mode, the base station of a macro cell,the base station or transmission node of a small cell, the sending nodein a high-frequency communication system, the sending node in anInternet of Things system, or the like may serve as the secondcommunication node, and the UE may serve as the first communicationnode.

In the embodiment, the signaling may include at least one of: RRCsignaling, MAC CE signaling, physical downlink control signaling, orphysical layer dynamic control signaling.

In the embodiment, the reference signal includes one of: a SRS, anuplink demodulation reference signal, a downlink demodulation referencesignal, a CSI-RS, an uplink PTRS, and a downlink PTRS.

In an exemplary implementation mode, the resource or parameter includesat least one of: a frequency domain starting position, a frequencydomain end position, a transmission bandwidth, a number of segments, abandwidth configuration index, a bandwidth parameter, a parameterconfigured to indicate whether a resource is repeated or the same, anantenna port number or index, a calculation manner of a frequency domainstarting position of a maximum bandwidth of the reference signal in amulti-level bandwidth structure, a parameter related to obtaining thefrequency domain starting position of the maximum bandwidth of thereference signal in the multi-level bandwidth structure, or informationof the multi-level bandwidth structure containing the reference signal.

In an exemplary implementation mode, determining a resource or parameterfor transmitting a reference signal based on the signaling or based onthe signaling and a rule predefined by the first communication node andthe second communication node includes at least one of the stepsdescribed below.

The second communication node determines a bandwidth configuration indexactually used by the second communication node based on at least one ofa bandwidth value or the bandwidth configuration index of a bandwidthpart (BWP) configured by the signaling for the second communication nodeand the rule predefined by the first communication node and the secondcommunication node.

The second communication node determines a transmission bandwidth set ofthe reference signal based on the bandwidth configuration index of thereference signal and the rule predefined by the first communication nodeand the second communication node.

The second communication node determines the transmission bandwidth orthe number of segments of the reference signal based on at least one ofthe bandwidth value, the bandwidth configuration index or the bandwidthparameter of the bandwidth part configured by the signaling for thesecond communication node and the rule predefined by the firstcommunication node and the second communication node.

In an exemplary implementation mode, the step in which the secondcommunication node determines a bandwidth configuration index actuallyused by the second communication node based on at least one of abandwidth value or the bandwidth configuration index of a bandwidth partconfigured by the signaling for the second communication node and therule predefined by the first communication node and the secondcommunication node includes the step described below.

Determining the bandwidth configuration index actually used by thesecond communication node includes at least one of:

${{(1)\mspace{14mu} 4 \times \left\lfloor \frac{N_{BWP}}{4} \right\rfloor} - C_{SRS}};$${{(2)\mspace{14mu} 8 \times \left\lfloor \frac{N_{BWP}}{8} \right\rfloor} - C_{SRS}};$${{(3)\mspace{14mu} 12 \times \left\lfloor \frac{N_{BWP}}{12} \right\rfloor} - C_{SRS}};$${{(4)\mspace{14mu} 16 \times \left\lfloor \frac{N_{BWP}}{16} \right\rfloor} - C_{SRS}};$or

(5) when a maximum transmission bandwidth of the reference signalcorresponding to the bandwidth configuration index is less than or equalto

${4 \times \left\lfloor \frac{N_{BWP}}{4} \right\rfloor\mspace{14mu}{or}\mspace{20mu} 8 \times \left\lfloor \frac{N_{BWP}}{8} \right\rfloor\mspace{14mu}{or}}\;$${12 \times \left\lfloor \frac{N_{BWP}}{12} \right\rfloor\mspace{14mu}{or}\mspace{20mu} 16 \times \left\lfloor \frac{N_{BWP}}{16} \right\rfloor}\;,$selecting a maximum bandwidth configuration index and subtracting themaximum bandwidth configuration index by C_(SRS) to obtain as thebandwidth configuration index actually used by the second communicationnode.

└ ┘ is a round-down function, N_(BWP) is the bandwidth value of thebandwidth part, C_(SRS) is the bandwidth configuration index, and thefirst communication node configures C_(SRS) and N_(BWP) for the secondcommunication node through the signaling.

In an exemplary implementation mode, the step in which the secondcommunication node determines a transmission bandwidth set of thereference signal based on the bandwidth configuration index of thereference signal and the rule predefined by the first communication nodeand the second communication node includes the step described below.

When the bandwidth configuration index of the reference signal isgreater than or equal to 17, or the bandwidth configuration index of thereference signal is less than or equal to 14, or the bandwidthconfiguration index of the reference signal is an integer comprised in arange from 0 to 31 or from 0 to 63, indicating the transmissionbandwidth set includes at least one of:

(1) 108, 36, 12, 4;

(2) 112, 56, 28, 4;

(3) 112, 56, 8, 4;

(4) 120, 60, 20, 4;

(5) 120, 40, 20, 4;

(6) 128, 64, 32, 4;

(7) 128, 32, 16, 4;

(8) 128, 32, 8, 4;

(9) 136, 68, 4, 4;

(10) 144, 72, 24, 4;

(11) 144, 72, 36, 4;

(12) 144, 72, 12, 4;

(13) 144, 48, 24, 4;

(14) 144, 48, 12, 4;

(15) 144, 48, 16, 4;

(16) 144, 48, 8, 4;

(17) 160, 80, 40, 4;

(18) 160, 80, 20, 4;

(19) 160, 40, 20, 4;

(20) 160, 40, 8, 4;

(21) 168, 84, 28, 4;

(22) 176, 88, 44, 4;

(23) 180, 60, 20, 4;

(24) 192, 96, 32, 4;

(25) 192, 96, 48, 4;

(26) 192, 48, 24, 4;

(27) 192, 48, 16, 4;

(28) 192, 48, 12, 4;

(29) 200, 100, 20, 4;

(30) 200, 40, 20, 4;

(31) 200, 40, 8, 4;

(32) 208, 104, 52, 4;

(33) 216, 108, 36, 4;

(34) 240, 120, 60, 4;

(35) 240, 120, 40, 4;

(36) 240, 120, 20, 4;

(37) 240, 80, 40, 4;

(38) 240, 80, 20, 4;

(39) 240, 80, 8, 4;

(40) 256, 128, 64, 4;

(41) 256, 64, 32, 4;

(42) 256, 64, 16, 4;

(43) 256, 64, 8, 4; or

(44) 272, 136, 68, 4.

In an exemplary implementation mode, the step in which the secondcommunication node determines the transmission bandwidth or the numberof segments of the reference signal based on at least one of thebandwidth value, the bandwidth configuration index or the bandwidthparameter of the bandwidth part configured by the signaling for thesecond communication node and the rule predefined by the firstcommunication node and the second communication node is performed in oneof the following manners:

Manner 1:

${{{Let}\mspace{14mu} k_{i}} = {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)\text{/}4}{2^{i}} \right)}},$then the transmission bandwidth is:

  m_(SRS, 0) = 4 × k₀; $m_{{SRS},{i + 1}} = \left\{ \begin{matrix}{{4 \times k_{i + 1}},} & {{{if}\mspace{14mu}\left( {\left( {N_{BWP} - {4 \times C_{SRS}}} \right)/4} \right){mod}\; 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{4,} & {{otherwise}.}\end{matrix} \right.$

Manner 2:

${{{Let}\mspace{14mu} k_{i}} = {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)\text{/}4}{2^{i}} \right)}},$then the transmission bandwidth is:

     m_(SRS, 0) = 4 × k₀; $m_{{SRS},{i + 1}} = \left\{ {\begin{matrix}{{4 \times k_{i + 1}},} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} + {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{4,} & {otherwise}\end{matrix}.} \right.$

Manner 3:

The number of segments is:

N₀ = 1; $N_{i + 1} = \left\{ {\begin{matrix}{2,} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} - {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{k_{i},} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} - {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Odd}}} \\{1,} & {otherwise}\end{matrix}.} \right.$

Manner 4:

The transmission bandwidth is

$m_{{SRS},i} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} - {16 \times C_{SRS}}} \right)/16} \right\rfloor/2^{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix};{{{or}m_{{SRS},i}} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} + {16 \times C_{SRS}}} \right)/16} \right\rfloor/2^{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix}.} \right.}} \right.$

Manner 6:

The transmission bandwidth is

$m_{{SRS},i} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} - {16 \times C_{SRS}}} \right)/16} \right\rfloor/d_{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix};{{{or}m_{{SRS},i}} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} + {16 \times C_{SRS}}} \right)/16} \right\rfloor/d_{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix}.} \right.}} \right.$d_(i) is 2^(i)×3^(j)×5^(l), or d_(i) is one or more integers in a rangefrom 1 to 17, including 1 and 17, values of i, j and l are non-negativeintegers, m_(SRS,i) is the transmission bandwidth of the referencesignal, floor( ) is a round-down function, └ ┘ is a round-down function,i=B_(SRS), B_(SRS) is the bandwidth parameter of the reference signal,N_(BWP) is the bandwidth value of the bandwidth part, and the firstcommunication node configures B_(SRS) and N_(BWP) for the secondcommunication node through the signaling.

In an exemplary implementation mode, determining a resource or parameterfor transmitting a reference signal based on the signaling or based onthe signaling and a rule predefined by the first communication node andthe second communication node includes the steps described below.

An offset value of a frequency domain starting position corresponding toa maximum bandwidth in a multi-level bandwidth structure containing thereference signal relative to a first frequency domain starting positionis obtained through the signaling or the agreed rule, where the firstfrequency domain starting position is obtained by the secondcommunication node based on the rule predefined by the firstcommunication node and the second communication node.

In an exemplary implementation mode, the calculation manner of afrequency domain starting position of a maximum bandwidth of thereference signal in a multi-level bandwidth structure includes at leastone of:

(1) k ₀ ^((p))=(└N_(RB) ^(UL)/2┘−m_(SRS,0)/2−Δ_(offset) ^(PRB))N_(SC)^(RB)+k_(TC) ^((p)), where the first frequency domain starting positionis: k ₁ ^((p))=(└N_(RB) ^(UL)/2┘−m_(SRS,0)/2)N_(SC) ^(RB)+k_(TC) ^((p));

(2) k ₀ ^((p))=(└N_(RB)−m_(SRS,0) ^(max)−Δ_(offset) ^(PRB))N_(SC)^(RB)+k_(TC) ^((p)), where the first frequency domain starting positionis:

k ₁ ^((p))=(└N_(RB) ^(UL)−m_(SRS,0) ^(max))N_(sc) ^(RB)+k_(TC) ^((p));or

(3) k ₀ ^((p))=k_(TC) ^((p))+Δ_(offset) ^(PRB)N_(sc) ^(RB), where thefirst frequency domain starting position is: k ₁ ^((p))=k_(TC) ^((p)).

Δ_(offset) ^(PRB) is the offset value of the frequency domain startposition corresponding to the maximum bandwidth in the multi-levelbandwidth structure containing the reference signal relative to thefirst frequency domain start position and is an integer in units ofN_(SC) ^(RB), N_(RB) ^(UL) represents the bandwidth part, m_(SRS,0) islength information of a frequency domain bandwidth corresponding to themaximum bandwidth in the multi-level bandwidth structure, k_(TC) ^((p))represents an offset quantity of the maximum bandwidth within a unitN_(SC) ^(RB), p is a port index, and m_(SRS,0) ^(max) is lengthinformation of a maximum bandwidth in one or more multi-level bandwidthstructures.

In an exemplary implementation mode, the calculation manner of afrequency domain starting position of a maximum bandwidth of thereference signal in a multi-level bandwidth structure includes one of:

${{(1)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = K_{TC}^{(p)}};$${{(2)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor \frac{N_{RB}^{UL}}{2} \right\rfloor - {m_{{SRS},b}{\prod\limits_{b^{\prime} = 0}^{B_{SRS}}\;\frac{N_{b^{\prime}}}{2}}}} \right)N_{SC}^{RB}} + K_{TC}^{(p)}}};$${{(3)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {N_{RB}^{UL} - {m_{{SRS},b}{\prod\limits_{b^{\prime} = 0}^{B_{SRS}}\; N_{b^{\prime}}}}} \right)N_{SC}^{RB}} + K_{TC}^{(p)}}};$${{(4)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor {N_{RB}^{UL}/2} \right\rfloor - {m_{{SRS},0}/2} - \;\Delta_{offset}^{PRB}} \right)N_{SC}^{RB}} + k_{TC}^{(p)}}};$${{(5)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = \;{{\left( {N_{RB}^{UL} - m_{{SRS},0}^{\max}} \right)N_{sc}^{RB}} + k_{TC}^{(p)}}};$${{(6)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor {N_{RB}^{UL}/2} \right\rfloor - {m_{{SRS},0}/2}} \right)N_{SC}^{RB}} + k_{TC}^{(p)}}};$${{(7)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = \;{{\left( {N_{RB}^{UL} - m_{{SRS},0}^{\max} - \Delta_{offset}^{PRB}} \right)N_{sc}^{RB}} + k_{TC}^{(p)}}};{{{{or}(8)}\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {k_{TC}^{(p)} + {\Delta_{offset}^{PRB}{N_{sc}^{RB}.}}}}$

Δ_(offset) ^(PRB) is an offset value and an integer in units of N_(SC)^(RB), N_(RB) ^(UL) represents the bandwidth part, m_(SRS,0) is lengthinformation of a frequency domain bandwidth corresponding to the maximumbandwidth in the multi-level bandwidth structure, k_(TC) ^((p))represents an offset quantity of the maximum bandwidth within a unitN_(SC) ^(RB), p is a port index, and B_(SRS) is level information of abandwidth, in the multi-level bandwidth structure, of the referencesignal on one frequency domain symbol; and N_(b′) is the number ofbandwidths of a b′ level included in one bandwidth of the (b′−1) level,and m_(SRS,0) ^(max) is length information of a maximum bandwidth in oneor more multi-level bandwidth structures.

In an exemplary implementation mode, one bandwidth of bandwidths of abth level in the multi-level structure containing the reference signalincludes one or more bandwidths of a (b+1)th level, where b is anon-negative integer.

In an exemplary implementation mode, the parameter or a configurationrange of the parameter is obtained according to position information ofa time domain symbol in one time unit; or a reference signal resource islocated on different time domain symbols in one time unit, and theparameter or the configuration range of the parameter is different.

In an exemplary implementation mode, the antenna port number or indexremains unchanged on M consecutive time domain symbols, where M is aninteger greater than 0.

In an exemplary implementation mode, when a plurality of resources fortransmitting the reference signal are included, configuration values orparameter values of the plurality of resources are the same on Lconsecutive time domain symbols, or configuration values or parametervalues of the plurality of resources are different on L consecutive timedomain symbols, where L is an integer greater than 0.

In an exemplary implementation mode, when a plurality of resources fortransmitting the reference signal are included, the plurality ofresources constitute a resource set or a resource group, and a parameterof the resource set or the resource group is configured to indicatewhether the plurality of resources in the resource set or the resourcegroup are the same or repeated.

In an exemplary implementation mode, when the parameter indicatingwhether a resource is repeated or the same has a value of 1 or the stateis on, the parameter indicating whether a resource is repeated or thesame indicates that all parameter configuration values of a plurality ofSRS resources in a resource set or a resource group are the same, orthat parameter values used for representing transmission beams orantenna ports or frequency domain resources in the plurality of SRSresources are the same, or that the plurality of SRS resources use asame transmission beam or antenna port or frequency domain resource.

FIG. 3 is a flowchart of an information transmission method according toan embodiment of the present application. As illustrated in FIG. 3, theinformation transmission method in the embodiment may include the stepsdescribed below.

In S301, a first communication node determines a first-level parameterand a second-level parameter of a reference signal resource, where thefirst-level parameter includes at least one of: the number N1 of timedomain symbols continuously transmitted by a reference signal in a samefrequency domain unit, an antenna switching switch function A1 of thereference signal, or a frequency hopping switch function B1; and thesecond-level parameter includes at least one of: the number N2 of timedomain symbols continuously transmitted by an antenna port group of thereference signal, an antenna switching switch function A2 of thereference signal in a time domain unit, or a frequency hopping switchfunction B2 of the reference signal in a time domain unit.

In S302, the first communication node receives the reference signalaccording to the first-level parameter and the second-level parameter.

The antenna ports in one antenna port group are simultaneouslytransmitted.

In an exemplary implementation mode, the step in which the firstcommunication node receives the reference signal according to thefirst-level parameter and the second-level parameter includes the stepdescribed below.

For the reference signal, N1 time domain symbols are first repeatedlyreceived in a frequency domain unit, and then N1 time domain symbols arerepeatedly received in another frequency domain unit that is hoppedinto.

In an exemplary implementation mode, the step in which the firstcommunication node receives the reference signal according to thefirst-level parameter and the second-level parameter includes the stepdescribed below.

When a plurality of port groups are provided, one port group is firstused to repeatedly receive N2 time domain symbols and then another portgroup is used to repeatedly receive N2 time domain symbols.

In an exemplary implementation mode, N2 is less than N1.

In an exemplary implementation mode, on the N1 time domain symbols ofone frequency domain unit, different antenna port groups aretime-division multiplexed, and each antenna port group continuouslyreceives N2 time domain symbols.

In an exemplary implementation mode, the method further includes thestep described below.

The first communication node indicates the first-level parameter and thesecond-level parameter of the reference signal resource to a secondcommunication node through signaling.

In an exemplary implementation mode, the number of time domain symbolsconfigured in the reference signal resource is N, N1 is less than orequal to N, and N2 is less than or equal to N.

In an implementation mode of the embodiment, the first communicationnode may be nodes such as a base station of a macro cell, a base stationor transmission node of a small cell, a sending node in a high-frequencycommunication system, or a sending node in an Internet of Things system,and the second communication node may be nodes in a communication systemsuch as a UE, a mobile phone, a portable device, or a car. In anotherimplementation mode, the base station of a macro cell, the base stationor transmission node of a small cell, the sending node in ahigh-frequency communication system, the sending node in an Internet ofThings system, or the like may serve as the second communication node,and the UE may serve as the first communication node.

FIG. 4 is a flowchart of an information transmission method according toan embodiment of the present application. As illustrated in FIG. 4, theinformation transmission method in the embodiment may include the stepsdescribed below.

In S401, a second communication node determines a first-level parameterand a second-level parameter of a reference signal resource, where thefirst-level parameter includes at least one of: the number N1 of timedomain symbols continuously transmitted by a reference signal in a samefrequency domain unit, an antenna switching switch function A1 of thereference signal, or a frequency hopping switch function B1; and thesecond-level parameter includes at least one of: the number N2 of timedomain symbols continuously transmitted by an antenna port group of thereference signal, an antenna switching switch function A2 of thereference signal in a time domain unit, or a frequency hopping switchfunction B2 of the reference signal in a time domain unit.

In S402, the second communication node transmits the reference signalaccording to the first-level parameter and the second-level parameter.

The antenna ports in one antenna port group are simultaneouslytransmitted.

In an exemplary implementation mode, the step in which the secondcommunication node transmits the reference signal according to thefirst-level parameter and the second-level parameter includes the stepdescribed below.

For the reference signal, N1 time domain symbols are first repeatedlytransmitted in a frequency domain unit, and then N1 time domain symbolsare repeatedly transmitted in another frequency domain unit that ishopped into.

In an exemplary implementation mode, the step in which the secondcommunication node transmits the reference signal according to thefirst-level parameter and the second-level parameter includes the stepdescribed below.

When a plurality of port groups are provided, one port group is firstused to repeatedly transmit N2 time domain symbols and then another portgroup is used to repeatedly transmit N2 time domain symbols.

In an exemplary implementation mode, N2 is less than N1.

In an exemplary implementation mode, on the N1 time domain symbols ofone frequency domain unit, different antenna port groups aretime-division multiplexed, and each antenna port group continuouslytransmits N2 time domain symbols.

In an exemplary implementation mode, the method further includes thestep described below.

The second communication node receives signaling through which a firstcommunication node indicates the first-level parameter and thesecond-level parameter of the reference signal resource.

In an exemplary implementation mode, the number of time domain symbolsconfigured in the reference signal resource is N, N1 is less than orequal to N, and N2 is less than or equal to N.

In an implementation mode of the embodiment, the first communicationnode may be nodes such as a base station of a macro cell, a base stationor transmission node of a small cell, a sending node in a high-frequencycommunication system, or a sending node in an Internet of Things system,and the second communication node may be nodes in a communication systemsuch as a UE, a mobile phone, a portable device, or a car. In anotherimplementation mode, the base station of a macro cell, the base stationor transmission node of a small cell, the sending node in ahigh-frequency communication system, the sending node in an Internet ofThings system, or the like may serve as the second communication node,and the UE may serve as the first communication node.

The solution of the present application will be described below by wayof a plurality of examples.

Example 1

In the example, a first communication node indicates, through signaling,a parameter for a second communication node to transmit an uplinkreference signal. Or both the first communication node and the secondcommunication node predefine the parameter for the second communicationnode to transmit the uplink reference signal, for example, a formula forcalculating a transmission bandwidth or the number of segments of a SRSis predefined by the first communication node and the secondcommunication node.

In the example, the reference signal is described by taking the SRS asan example. The parameter may include at least one of: a bandwidthconfiguration index, the transmission bandwidth, or a bandwidthparameter.

In the example, after receiving the signaling transmitted by the firstcommunication node, the second communication node may determine thetransmission bandwidth or the number of segments of the SRS based on oneof the following manners:

Manner 1:

${{{Let}\mspace{14mu} k_{i}} = {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)/4}{2^{i}} \right)}},$then the transmission bandwidth of the SRS is:

     m_(SRS, 0) = 4 × k₀; $m_{{SRS},{i + 1}} = \left\{ {\begin{matrix}{{4 \times k_{i + 1}},} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} - {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{4,} & {otherwise}\end{matrix}.} \right.$

Manner 2:

${{{Let}\mspace{14mu} k_{i}} = {{floor}\left( \frac{\left( {N_{BWP} + {4 \times C_{SRS}}} \right)/4}{2^{i}} \right)}},$then the transmission bandwidth is:

     m_(SRS, 0) = 4 × k₀; $m_{{SRS},{i + 1}} = \left\{ {\begin{matrix}{{4 \times k_{i + 1}},} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} + {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{4,} & {otherwise}\end{matrix}.} \right.$

Manner 3:

The number of segments is:

N₀ = 1; $N_{i + 1} = \left\{ {\begin{matrix}{2,} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} - {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Even}}} \\{k_{i},} & {{{if}\mspace{14mu}\left( {\left( {N_{{BWP}\;} - {4 \times C_{SRS}}} \right)/4} \right)\;{mod}\mspace{11mu} 2^{i}} = {{0\mspace{14mu}{and}\mspace{14mu} k_{i}} \in {Odd}}} \\{1,} & {otherwise}\end{matrix}.} \right.$

The transmission bandwidth of an i-th level may be determined accordingto a total bandwidth and the number of segments.

Manner 4:

The transmission bandwidth of the SRS is:

${m_{{SRS},i} = {4 \times {{floor}\left( \frac{\left( {N_{BWP} - {4 \times C_{SRS}}} \right)/4}{2^{i} \times 3^{j} \times 5^{l}} \right)}}};{or}$$k_{i} = {4 \times {{{floor}\left( \frac{\left( {N_{BWP} + {4 \times C_{SRS}}} \right)/4}{2^{i} \times 3^{j} \times 5^{l}} \right)}.}}$

Manner 5:

The transmission bandwidth is

$m_{{SRS},i} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} - {16 \times C_{SRS}}} \right)/16} \right\rfloor/2^{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix};{{{or}m_{{SRS},i}} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} + {16 \times C_{SRS}}} \right)/16} \right\rfloor/2^{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix}.} \right.}} \right.$

Manner 6:

The transmission bandwidth is

$m_{{SRS},i} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} - {16 \times C_{SRS}}} \right)/16} \right\rfloor/d_{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix};{{{or}m_{{SRS},i}} = \left\{ {\begin{matrix}{{16 \times {\left\lfloor {\left( {N_{{BWP}\;} + {16 \times C_{SRS}}} \right)/16} \right\rfloor/d_{i}}},} & {{{if}\mspace{14mu} i} < 3} \\{4,} & {otherwise}\end{matrix}.} \right.}} \right.$d_(i) is 2^(i)×3^(j)×5^(l), or d_(i) is one or more integers in a rangefrom 1 to 17, including 1 and 17, values of i, j and l are non-negativeintegers, m_(SRS,i) is the transmission bandwidth of the referencesignal, floor( ) is a round-down function, └ ┘ is a round-down function,i=B_(SRS), B_(SRS) is the bandwidth parameter of the reference signal,N_(BWP) is the bandwidth value of the bandwidth part, and the firstcommunication node configures B_(SRS) and N_(BWP) for the secondcommunication node through the signaling.

Example 2

In the example, a first communication node indicates, through signaling,a parameter for a second communication node to transmit an uplinkreference signal. Or both the first communication node and the secondcommunication node predefine the parameter for the second communicationnode to transmit the uplink reference signal, for example, aconfiguration table of a transmission bandwidth of a SRS is predefinedby the first communication node and the second communication node.

In the example, the reference signal is described by taking the SRS asan example. The parameter may include at least one of: a bandwidthconfiguration index, the transmission bandwidth, or a bandwidthparameter.

In the example, after receiving the signaling from the firstcommunication node, the second communication node may determine thetransmission bandwidth of the SRS according to at least one of N_(BWP),C_(SRS) and B_(SRS) that are configured with signaling and according tothe predefined configuration table of the transmission bandwidth.

For the configuration table of the transmission bandwidth of the SRS,the following Table 2a or Table 2b or Table 2c or Table 2d may bereferred to, where C_(SRS) is the bandwidth configuration index of theSRS, B_(SRS) is the bandwidth parameter of the SRS, and N_(BWP) is thebandwidth value of the uplink bandwidth part. The value of at least oneof N_(BWP), C_(SRS), and B_(SRS) may be configured by the firstcommunication node for the second communication node through signaling.

TABLE 2a B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 272 1 136 2 68 2 417 1 256 1 128 2 64 2 4 16 2 240 1 120 2 40 3 4 10 3 192 1 96 2 32 3 4 84 160 1 80 2 40 2 4 10 5 144 1 72 2 24 3 4 6 6 136 1 68 8 4 17 4 17 7128 1 64 2 32 2 4 8 8 120 1 60 2 20 3 4 5 9 96 1 48 2 24 2 4 6 10 96 132 3 16 2 4 4 11 80 1 40 2 20 2 4 5 12 72 1 24 3 12 2 4 3 13 64 1 32 216 2 4 4 14 60 1 20 3 4 5 4 1 15 48 1 24 2 12 2 4 3 16 48 1 16 3 8 2 4 217 40 1 20 2 4 5 4 1 18 36 1 12 3 4 3 4 1 19 32 1 16 2 8 2 4 2 20 24 1 46 4 1 4 1 21 20 1 4 5 4 1 4 1 22 16 1 4 4 4 1 4 1 23 12 1 4 3 4 1 4 1 248 1 4 2 4 1 4 1 25 4 1 4 1 4 1 4 1 26 to 31 Reserved

TABLE 2b B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 272 1 136 2 68 2 417 1 256 1 128 2 64 2 4 16 2 240 1 120 2 60 2 4 15 3 192 1 96 2 48 2 412 4 160 1 80 2 40 2 4 10 5 144 1 72 2 36 2 4 9 6 136 1 68 8 4 17 4 17 7128 1 64 2 32 2 4 8 8 120 1 60 2 20 3 4 5 9 96 1 48 2 24 2 4 6 10 96 132 3 16 2 4 4 11 80 1 40 2 20 2 4 5 12 72 1 24 3 12 2 4 3 13 64 1 32 216 2 4 4 14 60 1 20 3 4 5 4 1 15 48 1 24 2 12 2 4 3 16 48 1 16 3 8 2 4 217 40 1 20 2 4 5 4 1 18 36 1 12 3 4 3 4 1 19 32 1 16 2 8 2 4 2 20 24 1 46 4 1 4 1 21 20 1 4 5 4 1 4 1 22 16 1 4 4 4 1 4 1 23 12 1 4 3 4 1 4 1 248 1 4 2 4 1 4 1 25 4 1 4 1 4 1 4 1 26 to 31 Reserved

TABLE 2c B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 272 1 136 2 68 2 417 1 256 1 128 2 64 2 4 16 2 240 1 80 3 40 2 4 10 3 192 1 96 2 32 3 4 84 160 1 40 4 20 2 4 5 5 144 1 72 2 24 3 4 6 6 136 1 68 8 4 17 4 17 7 1281 64 2 32 2 4 8 8 120 1 60 2 20 3 4 5 9 96 1 48 2 24 2 4 6 10 96 1 32 316 2 4 4 11 80 1 40 2 20 2 4 5 12 72 1 24 3 12 2 4 3 13 64 1 32 2 16 2 44 14 60 1 20 3 4 5 4 1 15 48 1 24 2 12 2 4 3 16 48 1 16 3 8 2 4 2 17 401 20 2 4 5 4 1 18 36 1 12 3 4 3 4 1 19 32 1 16 2 8 2 4 2 20 24 1 4 6 4 14 1 21 20 1 4 5 4 1 4 1 22 16 1 4 4 4 1 4 1 23 12 1 4 3 4 1 4 1 24 8 1 42 4 1 4 1 25 4 1 4 1 4 1 4 1 26 to 31 Reserved

TABLE 2d B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 Range ofN_(BWP) m_(SRS, 0) N₀ m_(SRS, 1) N₁ m_(SRS, 2) N₂ m_(SRS, 3) N₃ 97 <=N_(BWP) < 112 96 1 48 2 24 2 4 6 112 <= N_(BWP) < 128 112 1 56 2 28 2 47 128 <= N_(BWP) < 144 128 1 64 2 32 2 4 8 144 <= N_(BWP) < 160 144 1 722 36 2 4 9 160 <= N_(BWP) < 176 160 1 80 2 40 2 4 10 176 <= N_(BWP) <192 176 1 88 2 44 2 4 11 192 <= N_(BWP) < 208 192 1 96 2 48 2 4 12 208<= N_(BWP) < 224 208 1 104 2 52 2 4 13 224 <= N_(BWP) < 240 224 1 112 256 2 4 14 240 <= N_(BWP) < 256 240 1 120 2 60 2 4 15 256 <= N_(BWP) <272 256 1 128 2 64 2 4 16 272 <= N_(BWP) <= 275 272 1 136 2 68 2 4 17

Example 3

In the example, a first communication node indicates, through signaling,a parameter for a second communication node to transmit an uplinkreference signal. Or both the first communication node and the secondcommunication node predefine the parameter for the second communicationnode to transmit the uplink signal, for example, a configuration tableof a transmission bandwidth of a SRS is predefined by the firstcommunication node and the second communication node.

In the example, the reference signal is described by taking the SRS asan example. The parameter may include at least one of: a bandwidthconfiguration index, the transmission bandwidth, or a bandwidthparameter.

In the example, after receiving the signaling from the firstcommunication node, the second communication node may determine thetransmission bandwidth of the SRS according to at least one of C_(SRS)and B_(SRS) that are configured with signaling and according to thepredefined configuration table of the transmission bandwidth.

In the example, for the configuration table of the transmissionbandwidth of the SRS, the following Table 3a or Table 3b or Table 3c orTable 3d may be referred to, where C_(SRS) is the bandwidthconfiguration index of the SRS, and B_(SRS) is the bandwidth parameterof the SRS. The value of at least one of C_(SRS) and B_(SRS) isconfigured by the first communication node for the second communicationnode through signaling.

TABLE 3a B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 4 1 4 1 4 1 4 1 18 1 4 2 4 1 4 1 2 12 1 4 3 4 1 4 1 3 16 1 4 4 4 1 4 1 4 20 1 4 5 4 1 4 15 24 1 4 6 4 1 4 1 6 32 1 16 2 8 2 4 2 7 36 1 12 3 4 3 4 1 8 40 1 20 2 45 4 1 9 48 1 16 3 8 2 4 2 10 48 1 24 2 12 2 4 3 11 60 1 20 3 4 5 4 1 1264 1 32 2 16 2 4 4 13 72 1 24 3 12 2 4 3 14 80 1 40 2 20 2 4 5 15 96 132 3 16 2 4 4 16 96 1 48 2 24 2 4 6 17 120 1 60 2 20 3 4 5 18 128 1 64 232 2 4 8 19 136 1 68 2 4 17 4 17 20 144 1 72 2 24 3 4 6 21 160 1 80 2 402 4 10 22 192 1 96 2 32 3 4 8 23 240 1 120 2 40 3 4 10 25 256 1 128 2 642 4 16 25 272 1 136 2 68 2 4 17 26 to 31 Reserved

TABLE 3b B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 4 1 4 1 4 1 4 1 18 1 4 2 4 1 4 1 2 12 1 4 3 4 1 4 1 3 16 1 4 4 4 1 4 1 4 20 1 4 5 4 1 4 15 24 1 4 6 4 1 4 1 6 32 1 16 2 8 2 4 2 7 36 1 12 3 4 3 4 1 8 40 1 20 2 45 4 1 9 48 1 16 3 8 2 4 2 10 48 1 24 2 12 2 4 3 11 60 1 20 3 4 5 4 1 1264 1 32 2 16 2 4 4 13 72 1 24 3 12 2 4 3 14 80 1 40 2 20 2 4 5 15 96 132 3 16 2 4 4 16 96 1 48 2 24 2 4 6 17 120 1 60 2 20 3 4 5 18 128 1 64 232 2 4 8 19 136 1 68 2 4 17 4 17 20 144 1 72 2 36 2 4 9 21 160 1 80 2 402 4 10 22 192 1 96 2 48 2 4 12 23 240 1 120 2 60 2 4 15 25 256 1 128 264 2 4 16 25 272 1 136 2 68 2 4 17 26 to 31 Reserved

TABLE 3c B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 4 1 4 1 4 1 4 1 18 1 4 2 4 1 4 1 2 12 1 4 3 4 1 4 1 3 16 1 4 4 4 1 4 1 4 20 1 4 5 4 1 4 15 24 1 4 6 4 1 4 1 6 32 1 16 2 8 2 4 2 7 36 1 12 3 4 3 4 1 8 40 1 20 2 45 4 1 9 48 1 16 3 8 2 4 2 10 48 1 24 2 12 2 4 3 11 60 1 20 3 4 5 4 1 1264 1 32 2 16 2 4 4 13 72 1 24 3 12 2 4 3 14 80 1 40 2 20 2 4 5 15 96 132 3 16 2 4 4 16 96 1 48 2 24 2 4 6 17 112 1 56 2 28 2 4 7 18 120 1 60 220 3 4 5 19 120 1 40 3 20 2 4 5 20 128 1 64 2 32 2 4 8 21 136 1 68 2 417 4 17 22 144 1 72 2 24 3 4 6 23 160 1 80 2 40 2 4 10 24 176 1 88 2 442 4 11 25 192 1 96 2 48 2 4 12 26 208 1 104 2 52 2 4 13 27 224 1 112 256 2 4 14 28 240 1 120 2 60 2 4 15 29 240 1 80 3 40 2 4 10 30 256 1 1282 64 2 4 16 31 272 1 136 2 68 2 4 17

TABLE 3d B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS, 0) N₀ m_(SRS, 1) N₁ m_(SRS, 2) N₂ m_(SRS, 3) N₃ 0 4 1 4 1 4 1 41 1 8 1 4 2 4 1 4 1 2 12 1 4 3 4 1 4 1 3 16 1 4 4 4 1 4 1 4 20 1 4 5 4 14 1 5 24 1 4 6 4 1 4 1 6 32 1 16 2 8 2 4 2 7 36 1 12 3 4 3 4 1 8 40 1 202 4 5 4 1 9 48 1 16 3 8 2 4 2 10 48 1 24 2 12 2 4 3 11 60 1 20 3 4 5 4 112 64 1 32 2 16 2 4 4 13 72 1 24 3 12 2 4 3 14 80 1 40 2 20 2 4 5 15 961 32 3 16 2 4 4 16 96 1 48 2 24 2 4 6 17 108 1 36 3 12 3 4 3 18 120 1 602 20 3 4 5 19 120 1 40 3 20 2 4 5 20 128 1 64 2 32 2 4 8 21 136 1 68 2 417 4 17 22 144 1 72 2 24 3 4 6 23 144 1 48 3 24 2 4 6 24 160 1 80 2 40 24 10 25 192 1 96 2 32 3 4 8 26 192 1 96 2 48 2 4 12 27 216 1 108 2 36 34 9 28 240 1 120 2 60 2 4 15 29 240 1 80 3 40 2 4 10 30 256 1 128 2 64 24 16 31 272 1 136 2 68 2 4 17

Example 4

In the example, a first communication node indicates, through signaling,a parameter for a second communication node to transmit an uplinkreference signal. Or both the first communication node and the secondcommunication node predefine the parameter for the second communicationnode to transmit the uplink signal, for example, a configuration tableof a transmission bandwidth of a SRS is predefined by the firstcommunication node and the second communication node.

In the example, the reference signal is described by taking the SRS asan example. The parameter may include at least one of: a bandwidthconfiguration index, the transmission bandwidth, a bandwidth parameteror a bandwidth value of an uplink bandwidth part.

In the example, after receiving the signaling from the firstcommunication node, the second communication node determines thetransmission bandwidth of the SRS according to at least one of thebandwidth value of an uplink bandwidth part, C_(SRS) and B_(SRS) thatare configured with signaling and according to the predefinedconfiguration table of the transmission bandwidth.

When the bandwidth value of the uplink bandwidth part N_(RB) ^(UL) isless than or equal to 110 physical resource blocks (PRB), theconfiguration table of the transmission bandwidth of the SRS in LTE isused, that is, the Table 2a or the Table 2b or the Table 2c or the Table2d is used.

When the bandwidth value of the uplink bandwidth part is greater than110 PRBs, Table 4e or Table 4f or Table 4g or Table 4i is used.

Table 4a lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when6≤N_(RB) ^(UL)<40.

TABLE 4a B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 36 1 12 3 4 3 4 11 32 1 16 2 8 2 4 2 2 24 1 4 6 4 1 4 1 3 20 1 4 5 4 1 4 1 4 16 1 4 4 4 14 1 5 12 1 4 3 4 1 4 1 6 8 1 4 2 4 1 4 1 7 4 1 4 1 4 1 4 1

Table 4b lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when6≤N_(RB) ^(UL)<40.

TABLE 4b B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 48 1 24 2 12 2 4 31 48 1 16 3 8 2 4 2 2 40 1 20 2 4 5 4 1 3 36 1 12 3 4 3 4 1 4 32 1 16 28 2 4 2 5 24 1 4 6 4 1 4 1 6 20 1 4 5 4 1 4 1 7 16 1 4 4 4 1 4 1

Table 4c lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when60≤N_(RB) ^(UL)<80.

TABLE 4c B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 72 1 24 3 12 2 4 31 64 1 32 2 16 2 4 4 2 60 1 20 3 4 5 4 1 3 48 1 24 2 12 2 4 3 4 48 1 163 8 2 4 2 5 40 1 20 2 4 5 4 1 6 36 1 12 3 4 3 4 1 7 32 1 16 2 8 2 4 2

Table 4d lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when80≤N_(RB) ^(UL)<110.

TABLE 4d B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 96 1 48 2 24 2 4 61 96 1 32 3 16 2 4 4 2 80 1 40 2 20 2 4 5 3 72 1 24 3 12 2 4 3 4 64 1 322 16 2 4 4 5 60 1 20 3 4 5 4 1 6 48 1 24 2 12 2 4 3 7 48 1 16 3 8 2 4 2

Table 4e lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when110≤N_(RB) ^(UL)<160.

TABLE 4e B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 144 1 72 2 24 3 46 1 136 1 68 8 4 17 4 17 2 128 1 64 2 32 2 4 8 3 96 1 48 2 24 2 4 6 4 961 32 3 16 2 4 4 5 80 1 40 2 20 2 4 5 6 72 1 24 3 12 2 4 3 7 64 1 32 2 162 4 4

Table 4f lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when160≤N_(RB) ^(UL)<200.

TABLE 4f B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 192 1 96 2 32 3 48 1 180 1 4 45 4 45 4 45 2 160 1 80 2 40 2 4 10 3 144 1 72 2 24 3 4 6 4136 1 68 8 4 17 4 17 5 128 1 64 2 32 2 4 8 6 96 1 48 2 24 2 4 6 7 96 132 3 16 2 4 4

Table 4g lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when200≤N_(RB) ^(UL)<240.

TABLE 4g B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 240 1 80 3 40 2 410 1 216 1 108 2 4 27 4 27 2 212 1 4 53 4 53 4 53 3 192 1 96 2 32 3 4 84 180 1 4 45 4 45 4 45 5 160 1 80 2 40 2 4 10 6 144 1 72 2 24 3 4 6 7136 1 68 8 4 17 4 17

Table 4i lists values of m_(SRS,b), and N_(b) (b=0, 1, 2, 3) when240≤N_(RB) ^(UL)<280.

TABLE 4i B_(SRS) = 0 B_(SRS) = 1 B_(SRS) = 2 B_(SRS) = 3 C_(SRS)m_(SRS,0) N₀ m_(SRS,1) N₁ m_(SRS,2) N₂ m_(SRS,3) N₃ 0 272 1 136 2 68 2 417 1 256 1 128 2 64 2 4 16 2 240 1 120 2 40 3 4 10 3 240 1 80 3 40 2 410 4 216 1 108 2 4 27 4 27 5 212 1 4 53 4 53 4 53 6 192 1 96 2 32 3 4 87 180 1 4 45 4 45 4 45

In the example, the first communication node indicates, throughsignaling, the parameter for the second communication node to transmitthe uplink reference signal, where the parameter may include: afrequency domain starting position corresponding to a maximum bandwidthof the SRS in a multi-level bandwidth structure.

For example, the calculation manner of the frequency domain startingposition corresponding to the maximum bandwidth in the multi-levelbandwidth structure is indicated by 2-bit physical downlink controlsignaling or high-layer signaling.

The calculation manner of the frequency domain starting positionincludes at least one of:

${{(1)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = K_{TC}^{(p)}};$${{(2)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor \frac{N_{RB}^{UL}}{2} \right\rfloor - {m_{{SRS},b}{\prod\limits_{b^{\prime} = 0}^{B_{SRS}}\;\frac{N_{b^{\prime}}}{2}}}} \right)N_{SC}^{RB}} + K_{TC}^{(p)}}};$${{(3)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {N_{RB}^{UL} - {m_{{SRS},b}{\prod\limits_{b^{\prime} = 0}^{B_{SRS}}\; N_{b^{\prime}}}}} \right)N_{SC}^{RB}} + K_{TC}^{(p)}}};$${{(4)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor {N_{RB}^{UL}/2} \right\rfloor - {m_{{SRS},0}/2} - \;\Delta_{offset}^{PRB}} \right)N_{SC}^{RB}} + k_{TC}^{(p)}}};$${{(5)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = \;{{\left( {N_{RB}^{UL} - m_{{SRS},0}^{\max}} \right)N_{sc}^{RB}} + k_{TC}^{(p)}}};$${{(6)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {{\left( {\left\lfloor {N_{RB}^{UL}/2} \right\rfloor - {m_{{SRS},0}/2}} \right)N_{SC}^{RB}} + k_{TC}^{(p)}}};$${{(7)\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = \;{{\left( {N_{RB}^{UL} - m_{{SRS},0}^{\max} - \Delta_{offset}^{PRB}} \right)N_{sc}^{RB}} + k_{TC}^{(p)}}};{{{{or}(8)}\mspace{14mu}{\overset{\_}{k}}_{0}^{(p)}} = {k_{TC}^{(p)} + {\Delta_{offset}^{PRB}{N_{sc}^{RB}.}}}}$

Δ_(offset) ^(PRB) is an offset value (that is, the number of PRBs offsetfrom the predetermined frequency domain starting position) and aninteger in units of N_(SC) ^(RB) (for example, the number of subcarriersin a PRB); N_(RB) ^(UL) represents the bandwidth part or an uplinksystem bandwidth (in units of PRBs); m_(SAS,0) is length information ofa frequency domain bandwidth corresponding to the maximum bandwidth inthe multi-level bandwidth structure (in units of PRBs, and for example,a length of a bandwidth of a 0th level in a tree structure); k_(TC)^((p)) represents an offset quantity of the maximum bandwidth within aunit N_(SC) ^(RB) (for example, a comb index value); B_(SRS) is levelinformation of a bandwidth, in the multi-level bandwidth structure, ofthe reference signal on one frequency domain symbol (as shown in FIG. 5,B_(SRS)=3); N_(b′) is the number of bandwidths, of a b'th level,included in one bandwidth of a (b′−1)th level; p is a port number orport index containing the reference signal; and m_(SRS,0) ^(max) islength information of a maximum bandwidth in one or more multi-levelbandwidth structures.

The multi-level bandwidth structure containing the reference signalrepresents that one bandwidth of bandwidths of a bth level includes oneor more bandwidths of a (b+1)th level, which may also be referred to asthe tree structure. For example, as shown in FIG. 5, one bandwidth of a(b=0)th level includes two bandwidths of a (b=1)th level, and onebandwidth of the (b=1)th level includes two bandwidths of a (b=2)thlevel. In FIG. 5, a bandwidth of the bth level always includes 2bandwidths of the (b+1)th level when b is different. FIG. 5 is only anexample, and other cases are not excluded, for example, in themulti-level bandwidth structure in FIG. 6, one bandwidth of the (b=2)thlevel corresponds to four bandwidths of the (b=3)th level.

Example 6

In the example, a first communication node indicates, through signaling,a parameter for a second communication node to transmit an uplinkreference signal. Or both the first communication node and the secondcommunication node predefine the parameter for the second communicationnode to transmit the uplink reference signal.

The parameter or a configuration range of the parameter is obtainedaccording to position information of a time domain symbol in one timeunit; or a reference signal resource is located on different time domainsymbols in one time unit, and the parameter or the configuration rangeof the parameter is different.

The parameters of the SRS on different time domain symbols in a timeslot are different (for example, the parameters may be configured at atime domain symbol level), and the parameters may include one or moreof: a frequency domain length occupied by the SRS, a frequency domainstarting position of a transmission bandwidth of the SRS, a frequencydomain starting position of a tree, a frequency domain end position, adiscrete frequency domain resource, a calculation manner of a frequencydomain starting position of a maximum bandwidth of the reference signalin a multi-level bandwidth structure, a parameter related to obtainingthe frequency domain starting position of the maximum bandwidth of thereference signal in the multi-level bandwidth structure, orconfiguration information of the multi-level bandwidth structure.

The physical uplink control channel (PUCCH) has different lengths, sothe frequency domain resources occupied by the PUCCH are different ondifferent time domain symbols. When the time domain symbol positions ofthe SRS are different, the corresponding parameters or parameter rangesneed to be adjusted. FIG. 7(a) to FIG. 7(f) are different schematicdiagrams of the frequency domain positions occupied by the PUCCH ondifferent time domain symbols, and the parameters or parameter ranges ofthe SRS are obtained according to a position index of the time domainsymbol in a time slot. The parameters may include: the transmissionbandwidth of the SRS on a time domain symbol (i.e., the transmissionbandwidth of the SRS may be different on different time domain symbols,similar to the difference in LTE), the frequency domain startingposition of the transmission bandwidth of the SRS (i.e., the frequencydomain starting position of the transmission bandwidth of the SRS may bedifferent on different time domain symbols, similar to the difference inLTE), a frequency domain starting position of a tree (i.e., thecalculation manner of a frequency domain starting position of a maximumbandwidth of the reference signal in a multi-level bandwidth structure,similar to the description herein), a frequency domain end position (forexample, the frequency domain end position may be different on differenttime domain symbols), a discrete frequency domain resource (due tofrequency domain fragments caused by the PUCCH, the PRBs occupied by theSRS may be non-contiguous on one time domain symbol, so that the PRBsets occupied by the SRSs may be different on different time domainsymbols), a parameter related to obtaining the frequency domain startingposition of the maximum bandwidth of the reference signal in themulti-level bandwidth structure (as described herein, which may changewith the time domain symbol) or configuration information of themulti-level bandwidths (tree structure parameters are different, forexample, different time domain symbols correspond to different treestructures, where a tree structure may be represented in a similar wayin LTE).

In the embodiment, the parameters or parameter ranges of the referencesignal may be different on different time domain symbols, where the SRSson different time domain symbols may belong to different SRS resources,or may belong to one SRS resource. A correspondence between a timedomain symbol and a parameter (or parameter range) may be established,and all SRS resources falling on a corresponding time domain symbol maycomply with the parameter or parameter range corresponding to the timedomain symbol. Or a correspondence between different time domain symbolsand parameters (or parameter ranges) of a SRS resource is established,and different SRS resources of one user falling on the same time domainsymbol may be different for the above parameters.

Example 7

In the example, a definition of a SRS resource may be well utilized forconfiguring parameters of the SRS. A base station may configure one ormore SRS resources for a user, and each SRS resource includes aplurality of parameters, such as the number of antenna ports X, aperiod, a time domain subframe or time slot offset, a comb index, afrequency domain starting position, whether frequency hopping exists, orwhether to perform antenna switching.

These parameters are configured with RRC signaling in the LTE system. Inthe NR system, all parameters may be placed in one SRS resourceparameter for configuration and are also configured with the RRCsignaling. Since a large number of time domain symbols in one time slotmay be used for SRS transmission in the NR system, the SRS resourceparameter also includes the number of time domain symbols occupied bythe SRS in one time slot N and a position of the time domain symbol.

In LTE, if the antenna switching is on, only one antenna port can bemapped on each time domain symbol. If the frequency hopping is on, theSRS will be located on different subbands when transmitted continuously.If the SRS resource is configured with N time domain symbols in one timeslot, the number of configured antennas is less than N, for example, ifN=4, the number of antennas is 2. If the frequency hopping and antennaswitching are on at the same time, the antenna and frequency switchingwill be too frequent, which will increase the complexity of the UE. Asshown in FIG. 8(a), during SRS transmission, the antenna port needs tobe switched 3 times on 4 time domain symbols in one time slot, and thefrequency domain position needs to be switched 3 times. s0, s1, s2, ands3 respectively represents a different time domain symbol in one timeslot. SB0 and SB1 represent different subbands or frequency domainunits.

To reduce the number of switching times, a two-level parameterconfiguration may be newly introduced in the parameter configuration ofthe SRS resource. The first-level parameter configuration is the numberN1 of time domain symbols continuously transmitted by the SRS in a samefrequency domain unit. Within N symbols of a SRS resource configuration(defined in a period transmission, i.e., in one time slot), the numberof symbols continuously transmitted by the SRS in the same frequencydomain unit is the value of N1, no matter which antenna port of the SRSis used for transmission. As shown in FIG. 8 (a), on one subband, sinceonly one time domain symbol is continuously transmitted by the SRS atone time, N1=1. As shown in FIGS. 8 (b) and 8 (c), on one subband, onlytwo time domain symbols are continuously transmitted by the SRS at onetime, so N1=2. It should be noted that N1 is the number of time domainsymbols continuously transmitted by the SRS in one frequency domain unitwithout distinguishing the antenna ports.

The second-level configuration parameter is the number of time domainsymbols continuously and repeatedly transmitted by some of the ports ofthe SRS, and N2 is less than N. N2 refers to the number of time domainsymbols continuously and repeatedly transmitted by one antenna portgroup in a frequency domain unit. All antenna ports in one antenna portgroup occupy the same time domain symbol resource, and may also locatein the same frequency domain unit or on the same subband, but thesequence or comb may be different. As shown in FIG. 8 (b), each antennais an antenna port group. N1=2 and N2=2, because each antenna iscontinuously transmitted twice on one subband. As shown in FIGS. 8 (c),N1=2 and N2=1, because the number of times each antenna is continuouslytransmitted on one subband is 1.

Therefore, in a SRS resource configuration parameter, any SRStransmission configuration may be achieved by adding two parameters,namely, N1 and N2. Thus the flexibility is maximized.

In one frequency domain unit and on N1 consecutive symbols, N2 timedomain symbols are continuously transmitted by one antenna group, andare not simultaneously transmitted by different antenna groups. At thistime, one or more antenna groups are continuously transmitted on N1 timedomain symbols. As shown in FIG. 8 (c), an antenna port is an antennaport group. At this time, N1=2 and N2=1, that is, on each subband, eachantenna port group is transmitted once, and time-division multiplexingis performed on N1 time domain symbols.

When the frequency hopping is on, the SRS needs to hop to anothersubband for transmission after continuously transmitting N1 symbols onone subband. If N1 is less than N, in one time domain unit, the SRSfirst repeatedly transmits N1 time domain symbols in one frequencydomain unit, and then repeatedly transmits N1 time domain symbols inanother frequency domain unit that is hopped into. If N2 is less thanN1, on N1 symbols in a frequency domain unit, one port group of the SRSis continuously transmitted N2 times, and then another antenna portgroup is transmitted N2 times until N1 symbols are all occupied.

It should be noted that the N time domain symbols are not necessarilyadjacent. An antenna port group may be considered as an antenna portgroup that can be transmitted simultaneously. For example, if the SRS isconfigured with 4 antennas, ports 0 and 1 are a group, ports 2 and 3 area group and the user can only transmit one antenna port group at a time,it takes 2 times to transmit 4 ports. The port group is also configuredby the base station.

Any flexible SRS transmission may be obtained based on configuration ofX, N, N1 and N2 and configuration of the antenna port group. Otherexamples are illustrated in FIGS. 8 (d), 8 (e), and 8 (f). For example,as shown in FIG. 8 (f), since N2=4, a port group 1 (including ports 0and 1) transmits 4 symbols before a port group 2 performs transmission.Since N1=2, the SRS transmits two time domain symbols on a subband 0 andthen performs transmission on a subband 1.

Optionally, the parameter configuration of N1 and N2 may be implicitlyreplaced by other parameters. For example, new parameters G1 and G2 areintroduced such that N1=N/G1, N2=N/G2. Or N2=N1/G2. Or to simplify thecomplexity of the standard, N2 may be fixed to a number, with no needfor configuration, for example N2=1.

According to the parameter setting of N1 and N2, the definition offrequency hopping in LTE 36.211 may be used, and the formula of LTE onlyneeds to be simply modified, that is,

${n_{SRS} = {F \cdot \frac{N}{N\; 1}}},$where F represents the total number of time slots transmitted from theinitial transmission of the SRS to the current time. For example,F=(n_(f)·10+n_(sf))·N_(slot) ^(subframe)+n_(s). For a specificsubcarrier interval, n_(f) is a frame number, n_(sf) is a subframenumber in one frame, N_(slot) ^(subframe) is the number of time slotsincluded in one subframe, and n_(s) is a time slot number in onesubframe. After this modification, N1 symbols are included in one SRStransmission, and N/N1 SRS transmissions are included in one time slot(with N symbols configured for the SRS). In this way, n_(SRS) is thenumber of SRS transmissions in F time slots.

Similarly, according to the parameter setting of N1 and N2, the formulaof antenna switching in LTE 36.213 may be used, and only needs to besimply modified. For a SRS with a total of 2 transmission antennas, andonly one antenna port can be transmitted at a time, the index formula ofthe new antenna may be changed as follows:a(n _(SRS) ,k)=(a ^(LTE)(n _(SRS))+k)mod 2, where k=0, . . . N1/N2−1.

The formula of a^(LTE)(n_(SRS)) is a(n_(SRS)) in the LTE formula.a(n_(SRS),k) represents an index of the antennas transmitted in the kthgroup among the N1 symbols in the a(n_(SRS)) transmission. It isemphasized here that N1 time domain symbols are included in one SRStransmission, the N1 time domain symbols are divided into G2=N/N2groups, and each group transmits one antenna port, so k=0, . . . G2−1.If the UE may transmit 2 antenna ports at a time and a total of 4antenna ports exist, then one group of transmission corresponds to 2antenna ports. For example, the four antenna ports are divided into twogroups, a port group 0 includes ports 0 and 1 and a port group 1includes ports 2 and 3, then when k=0, a(n_(SRS),k)=0 refers to theantenna port group 0 transmitted in the kth group and a(n_(SRS),k)=1refers to the antenna port group 1 transmitted in the kth group.

The two-level parameter configuration may further include that: thefirst-level parameter refers to an antenna switching switch function A1of the SRS, that is, a switching switch between time slots. If the A1 ison, the antenna group switching is only performed between time slots andnot within a time slot, at which time only one antenna group's SRS istransmitted in one time slot. If the A1 is off, the antenna groupswitching is not performed between time slots. The second-levelparameter refers to the antenna switching switch function A2 of the SRSin a time domain unit, that is, the antenna port group switching withina time slot. If A2 is on, different antenna port groups in one time slotmay be alternately transmitted. As shown in FIG. 8 (g), both the A1 andthe A2 are on, and two antenna port groups are switched within a timeslot and between time slots. As shown in FIG. 8 (h), the A1 is on andthe A2 is off, then the antenna port group is not switched within a timeslot. Thus the UE complexity may be reduced.

The two-level parameter configuration may further include that: thefirst-level parameter refers to a frequency hopping switch function B1of the SRS, that is, frequency hopping between time slots. Thesecond-level parameter refers to a frequency hopping switch function B2of the SRS within a time slot. If both the B1 and the B2 are on, the SRSperforms frequency hopping both within a time slot and between timeslots, as shown in FIG. 8 (i). If the B1 is on and the B2 is off, theSRS only performs frequency hopping between time slots, as shown in FIG.8 (j). Thus the UE complexity may be reduced.

In the method described above, in one time slot, one antenna portresource is configured with N symbols, and different antennas may betransmitted on different symbols. For more convenient antenna switching,the following configuration may be implemented: one SRS resource set isconfigured, where multiple SRS resources are included in the set, andeach resource corresponds to one SRS antenna port or antenna port group,so that the same effect can be achieved. At this time, in a SRSresource, antenna switching is not allowed, and all antenna ports in oneresource are simultaneously transmitted. For example, X resources areconfigured in the SRS resource set, a resource 0 represents the antennaport or antenna port group 0, a resource 1 represents the antenna portor port group 1, and a resource X−1 represents an antenna port orantenna port group X−1. If the resource has an ID, the ID may correspondto the SRS antenna port group. If each resource includes X1 antennaports, the total number of antenna ports is X*X1. The X1 antenna portscorresponding to each resource are an antenna port group, and theantennas within a group are transmitted on the same time domain symbol.

In the SRS resource set, some parameters configured for all SRSresources are the same, such as a beam ID indicating the SRStransmission (corresponding to an ID of an already transmitted SRSresource), the number of time domain symbols included in the resource, aperiod, SRS transmission bandwidth (similar to CSRS in LTE), BSRS, bhop,power control and other parameters.

Example 8

In the example, a first communication node indicates, through signaling,a resource or parameter for a second communication node to transmit areference signal. Or both the first communication node and the secondcommunication node predefine the resource or parameter for the secondcommunication node to transmit the reference signal.

The resource or parameter includes at least one of: a parameterindicating whether a resource is repeated or the same, or an antennaport number or index.

Exemplarily, the antenna port number or index remains unchanged on Mconsecutive time domain symbols, where M is an integer greater than 0.

Exemplarily, configuration values or parameter values of a plurality ofresources are the same on L consecutive time domain symbols, orconfiguration values or parameter values of the plurality of resourcesare different on L consecutive time domain symbols, where L is aninteger greater than 0.

Exemplarily, the plurality of resources constitute a resource set or aresource group, and a parameter of the resource set or the resourcegroup is configured to indicate whether the plurality of resources inthe resource set or the resource group are the same or repeated.

For example, the first communication node configures a resource set orresource group for the second communication node. The resource set orresource group includes one or more resources, and simultaneouslyincludes a parameter indicating whether a resource is repeated or thesame. This parameter is assumed as SRS_Resource_Repetition. If theparameter SRS_Resource_Repetition has a value of 1 or the state is on, aplurality of SRS resources in the SRS resource set or resource group areindicated to be the same or repeated; if the parameterSRS_Resource_Repetition has a value of 0 or the state is off, the SRSresources in the SRS resource set or resource group are not indicated tobe the same or repeated. If the plurality of SRS resources in the SRSresource set or resource group are the same or repeated, all parameterconfiguration values of the plurality of SRS resources are indicated tobe the same, or parameter values used for representing transmissionbeams or antenna ports or frequency domain resources in the plurality ofSRS resources are indicated to be the same, or the plurality of SRSresources are indicated to use a same transmission beam or antenna portor frequency domain resource.

For example, a resource set or resource group includes two SRSresources, which are marked as a SRS resource 1 and a SRS resource 2.When the SRS resources are indicated to be the same, all parameterconfiguration values in the SRS resource 1 and the SRS resource 2 arethe same, or the SRS resource 1 and the SRS resource 2 use the sametransmission beam or antenna port or frequency domain resource. When theSRS resources are indicated to be different, all parameter configurationvalues in the SRS resource 1 and the SRS resource 2 are different, orthe SRS resource 1 and the SRS resource 2 use different transmissionbeams or antenna ports or frequency domain resources.

FIG. 9 is a schematic diagram of an information transmission apparatusaccording to an embodiment of the present application. As shown in FIG.9, the embodiment provides an information transmission apparatus,applied to a first communication node, including a first processingmodule 901 and a first transmitting module 902.

The first processing module 901 is configured to determine a resource orparameter for a second communication node to transmit a referencesignal.

The first transmitting module 902 is configured to indicate the resourceor parameter to the second communication node through signaling.

The resource or parameter at least includes one or more of: a frequencydomain starting position, a frequency domain end position, atransmission bandwidth, a number of segments, a bandwidth configurationindex, a bandwidth parameter, a parameter indicating whether a resourceis repeated or the same, an antenna port number or index, a calculationmanner of a frequency domain starting position of a maximum bandwidth ofthe reference signal in a multi-level bandwidth structure, a parameterrelated to obtaining the frequency domain starting position of themaximum bandwidth of the reference signal in the multi-level bandwidthstructure, or information of the multi-level bandwidth structurecontaining the reference signal.

For a description of the apparatus provided in the embodiment, referencemay be made to the embodiment corresponding to FIG. 1, and thus nofurther details are provided herein.

FIG. 10 is a schematic diagram of an information transmission apparatusaccording to an embodiment of the present application. As shown in FIG.10, the embodiment provides an information transmission apparatus,applied to a second communication node, including a first receivingmodule 1001, a second processing module 1002 and a second transmittingmodule 1003.

The first receiving module 1001 is configured to receive signalingtransmitted by a first communication node.

The second processing module 1002 is configured to determine a resourceor parameter for transmitting a reference signal based on the signalingor based on the signaling and a rule predefined by the firstcommunication node and the second processing module.

The second transmitting module 1003 is configured to use the resource orparameter to transmit the reference signal.

The resource or parameter includes at least one of: a frequency domainstarting position, a frequency domain end position, a transmissionbandwidth, a number of segments, a bandwidth configuration index, abandwidth parameter, a parameter indicating whether a resource isrepeated or the same, an antenna port number or index, a calculationmanner of a frequency domain starting position of a maximum bandwidth ofthe reference signal in a multi-level bandwidth structure, a parameterrelated to obtaining the frequency domain starting position of themaximum bandwidth of the reference signal in the multi-level bandwidthstructure, or information of the multi-level bandwidth structurecontaining the reference signal.

For a description of the apparatus provided in the embodiment, referencemay be made to the embodiment corresponding to FIG. 2, and thus nofurther details are provided herein.

FIG. 11 is a schematic diagram of an information transmission apparatusaccording to an embodiment of the present application. As shown in FIG.11, the embodiment provides an information transmission apparatus,applied to a first communication node, including a third processingmodule 1101 and a second receiving module 1102.

The third processing module 1101 is configured to determine afirst-level parameter and a second-level parameter of a reference signalresource, where the first-level parameter includes at least one of: thenumber N1 of time domain symbols continuously transmitted by a referencesignal in a same frequency domain unit, an antenna switching switchfunction A1 of the reference signal, or a frequency hopping switchfunction B1; and the second-level parameter includes at least one of:the number N2 of time domain symbols continuously transmitted by anantenna port group of the reference signal, an antenna switching switchfunction A2 of the reference signal in a time domain unit, or afrequency hopping switch function B2 of the reference signal in a timedomain unit.

The second receiving module 1102 is configured to receive the referencesignal according to the first-level parameter and the second-levelparameter.

The number of time domain symbols configured in the reference signalresource is N, N1 is less than or equal to N, and N2 is less than orequal to N.

For a description of the apparatus provided in the embodiment, referencemay be made to the embodiment corresponding to FIG. 3, and thus nofurther details are provided herein.

FIG. 12 is a schematic diagram of an information transmission apparatusaccording to an embodiment of the present application. As shown in FIG.12, the embodiment provides an information transmission apparatus,applied to a second communication node, including a fourth processingmodule 1201 and a third transmitting module 1202.

The fourth processing module 1201 is configured to determine afirst-level parameter and a second-level parameter of a reference signalresource, where the first-level parameter includes at least one of: thenumber N1 of time domain symbols continuously transmitted by a referencesignal in a same frequency domain unit, an antenna switching switchfunction A1 of the reference signal, or a frequency hopping switchfunction B1; and the second-level parameter includes at least one of:the number N2 of time domain symbols continuously transmitted by anantenna port group of the reference signal, an antenna switching switchfunction A2 of the reference signal in a time domain unit, or afrequency hopping switch function B2 of the reference signal in a timedomain unit.

The third transmitting module 1202 is configured to transmit thereference signal according to the first-level parameter and thesecond-level parameter.

The number of time domain symbols configured in the reference signalresource is N, N1 is less than or equal to N, and N2 is less than orequal to N.

For a description of the apparatus provided in the embodiment, referencemay be made to the embodiment corresponding to FIG. 4, and thus nofurther details are provided herein.

FIG. 13 is a schematic diagram of a communication node according to anembodiment of the present application. As shown in FIG. 13, theembodiment provides a communication node 1300, such as a base station,including a first memory 1301 and a first processor 1302; and the firstmemory 1301 is configured to store information transmission programswhich, when executed by the first processor 1302, implement the steps ofthe information transmission method illustrated in FIG. 1.

It should be understood by those skilled in the art that thecommunication node structure illustrated in FIG. 13 does not limit thecommunication node 1300, and the communication node 1300 may includemore or fewer components than those illustrated, or may be configured bycombining certain components or using different components.

The first processor 1302 may include, but is not limited to, amicrocontroller unit (MCU), a field programmable gate array (FPGA) oranother processing apparatus. The first memory 1301 may be configured tostore software programs of application software, and modules, such asprogram instructions or modules corresponding to the informationtransmission method in the embodiment. The first processor 1302 executesthe software programs and modules stored in the first memory 1301 toperform various functional applications and data processing, forexample, to implement the information transmission method described inthe embodiment. The first memory 1301 may include a high-speed randomaccess memory, and may further include a nonvolatile memory, such as oneor more magnetic storage apparatuses, flash memories or othernonvolatile solid-state memories. In some examples, the first memory1301 may include memories which are remotely disposed relative to thefirst processor 1302 and these remote memories may be connected to thecommunication node 1300 via a network. Examples of such a networkinclude, but are not limited to, the Internet, intranets, local areanetworks, mobile communication networks, and combinations thereof.

Exemplarily, the communication node 1300 described above may furtherinclude a first communication unit 1303; and the first communicationunit 1303 may receive or transmit data via a network. In one example,the first communication unit 1303 may be a radio frequency (RF) module,which is configured to wirelessly communicate with the Internet.

FIG. 14 is a schematic diagram of a communication node according to anembodiment of the present application. As shown in FIG. 14, theembodiment provides a communication node 1400, such as a UE, including asecond memory 1401 and a second processor 1402; and the second memory1401 is configured to store information transmission programs which,when executed by the second processor 1402, implement the steps of theinformation transmission method illustrated in FIG. 2.

It should be understood by those skilled in the art that thecommunication node structure illustrated in FIG. 14 does not limit thecommunication node 1400, and the communication node 1400 may includemore or fewer components than those illustrated, or may be configured bycombining certain components or using different components.

Exemplarily, the communication node 1400 described above may furtherinclude a second communication unit 1403; and the second communicationunit 1403 may receive or transmit data via a network.

For a description of the second memory, the second processor, and thesecond communication unit in the embodiment, reference may be made tothe description of the first memory, the first processor, and the firstcommunication unit, and thus no further details are provided herein.

An embodiment of the present application further provides acommunication node, including: a third memory and a third processor,where the third memory is configured to store information transmissionprograms which, when executed by the third processor, implement thesteps of the information transmission method illustrated in FIG. 3.

An embodiment of the present application further provides acommunication node, including: a fourth memory and a fourth processor,where the fourth memory is configured to store information transmissionprograms which, when executed by the fourth processor, implement thesteps of the information transmission method illustrated in FIG. 4.

For a description of the third memory, the third processor, the fourthmemory and the fourth processor, reference may be made to thedescription of the first memory and the first processor, and thus nofurther details are provided herein.

In addition, an embodiment of the present application further provides acomputer-readable medium, which is configured to store informationtransmission programs which, when executed by a processor, implement thesteps of the information transmission method illustrated in FIG. 1, or2, or 3, or 4.

It should be understood by those skilled in the art that functionalmodules or units in all or part of the steps of the method, the systemand the apparatus disclosed above may be implemented as software,firmware, hardware and appropriate combinations thereof. In the hardwareimplementation, the division of functional modules or units mentioned inthe above description may not correspond to the division of physicalcomponents. For example, one physical component may have multiplefunctions, or one function or step may be executed jointly by severalphysical components. Some or all components may be implemented assoftware executed by processors such as digital signal processors ormicrocontrollers, hardware, or integrated circuits such as applicationspecific integrated circuits. Such software may be distributed oncomputer-readable media, which may include computer storage media (ornon-transitory media) and communication media (or transitory media). Asis known to those skilled in the art, the term, computer storage media,includes volatile and nonvolatile, removable and non-removable mediaimplemented in any method or technology for storing information (such ascomputer-readable instructions, data structures, program modules orother data). The computer storage media include, but are not limited to,random access memory (RAM), read-only memory (ROM), electricallyerasable programmable read-only memory (EEPROM), flash memory or othermemory technologies, compact disc read-only memory (CD-ROM), digitalversatile disc (DVD), or other optical disc storage, magnetic cassette,magnetic tape, magnetic disk storage or other magnetic storage devices,or any other media configured for storing desired information andaccessible by the computer. In addition, as is known to those skilled inthe art, communication media generally include computer-readableinstructions, data structures, program modules or other data inmodulated data signals such as carriers or other transmissionmechanisms, and may include any information delivery medium.

Although the implementation modes disclosed by the present applicationare as described above, the content thereof is merely embodiments forfacilitating the understanding of the present application and is notintended to limit the present application. Any person skilled in the artto which the present application pertains may make any modifications andchanges in the forms and details of the implementation without departingfrom the spirit and scope disclosed by the present application, but thepatent protection scope of the present application is still subject tothe scope defined by the appended claims.

What is claimed is:
 1. A wireless communication method, comprising:determining, by a first communication node, a first parameter indicatinga bandwidth of a sounding reference signal, a second parameterindicating a bandwidth configuration of the sounding reference signal,and an offset value of a first frequency domain starting position of thesounding reference signal relative to a second frequency domain startingposition, wherein the first frequency domain starting position isdetermined based on k ₀ ^((p))=k_(TC) ^((p))+Δ_(offset) ^(PRB)N_(sc)^(RB), wherein Δ_(offset) ^(PRB) is the offset value of the firstfrequency domain starting position, N_(sc) ^(RB) is a number ofsubcarriers in a physical resource block, and k_(TP) ^((p)) is thesecond frequency domain starting position, and wherein a transmissionbandwidth set of the sounding reference signal is determined accordingto the second parameter indicating the bandwidth configuration of thesounding reference signal, the transmission bandwidth set comprising:112, 56, 28, 4; 120, 60, 20, 4; 128, 64, 32, 4; 136, 68, 4, 4; 144, 72,36, 4; 144, 48, 16, 4; 160, 80, 40, 4; 160, 80, 20, 4; 168, 84, 28, 4;176, 88, 44, 4; 192, 96, 48, 4; 208, 104, 52, 4; 216, 108, 36, 4; 240,120, 60, 4; 240, 80, 20, 4; 256, 128, 64, 4; and 272, 136, 68, 4; andtransmitting a signaling message to a second communication node, whereinthe signaling message includes the first parameter, the secondparameter, and the offset value.
 2. The method of claim 1, wherein thesecond parameter indicating the bandwidth configuration of the soundingreference signal is an integer in a range from 0 to
 63. 3. The method ofclaim 1, comprising: configuring a plurality of resources for the secondcommunication node, wherein the signaling message includes a thirdparameter to allow the second communication node to switch antennasusing the plurality of the resources.
 4. A non-transitory storage mediumhaving code stored thereon, the code upon execution by a processor,causing the processor to implement a method of claim
 1. 5. Thenon-transitory storage medium of claim 4, wherein the second parameterindicating the bandwidth configuration of the sounding reference signalis an integer in a range from 0 to
 63. 6. The non-transitory storagemedium of claim 4, wherein the method further comprises: configuring aplurality of resources for the second communication node, wherein thesignaling message includes a third parameter to allow the secondcommunication node to switch antennas using the plurality of theresources.
 7. A wireless communication method, comprising: receiving, bya second communication node, a signaling message transmitted by a firstcommunication node, wherein the signaling message includes a firstparameter indicating a bandwidth of a sounding reference signal, asecond parameter indicating a bandwidth configuration of the soundingreference signal, and an offset value of a first frequency domainstarting position of the sounding reference signal relative to a secondfrequency domain starting position, wherein the first frequency domainstarting position is determined based on k ₀ ^((p))=k_(TC)^((p))+Δ_(offset) ^(PRB)N_(sc) ^(RB), and wherein Δ_(offset) ^(PRB) isthe offset value of the first frequency domain starting position, N_(sc)^(RB) is a number of subcarriers in a physical resource block, andk_(TC) ^((p)) is the second frequency domain starting position;determining, by the second communication node, a transmission bandwidthset of the sounding reference signal according to the second parameterindicating the bandwidth configuration of the sounding reference signal,wherein the transmission bandwidth set comprises: 112, 56, 28, 4; 120,60, 20, 4; 128, 64, 32, 4; 136, 68, 4, 4; 144, 72, 36, 4; 144, 48, 16,4; 160, 80, 40, 4; 160, 80, 20, 4; 168, 84, 28, 4; 176, 88, 44, 4; 192,96, 48, 4; 208, 104, 52, 4; 216, 108, 36, 4; 240, 120, 60, 4; 240, 80,20, 4; 256, 128, 64, 4; and 272, 136, 68, 4; and determining, by thesecond communication node, a resource based on the first parameter, thesecond parameter indicating the transmission bandwidth set, and theoffset value included in the signaling message; transmitting, by thesecond communication node, the sounding reference signal using theresource.
 8. The method of claim 7, wherein the second parameterindicating the bandwidth configuration of the sounding reference signalis an integer in a range from 0 to
 63. 9. The method of claim 7,comprising: switching, by the second communication node, antennas usinga plurality of resources configured by the first communication node. 10.A non-transitory storage medium having code stored thereon, the codeupon execution by a processor, causing the processor to implement amethod of claim
 7. 11. The non-transitory storage medium of claim 10,wherein the second parameter indicating the bandwidth configuration ofthe sounding reference signal is an integer in a range from 0 to
 63. 12.The non-transitory storage medium of claim 10, wherein the methodfurther comprises: switching, by the second communication node, antennasusing a plurality of resources configured by the first communicationnode.
 13. A wireless communication device, comprising: a processor, anda memory including processor executable code, wherein the processorexecutable code upon execution by the processor configures the processorto: determine a first parameter indicating a bandwidth of a soundingreference signal, a second parameter indicating a bandwidthconfiguration of the sounding reference signal, and an offset value of afirst frequency domain starting position of the sounding referencesignal relative to a second frequency domain starting position, whereinthe first frequency domain starting position is determined based on k ₀^((p))=k_(TC) ^((p))+Δ_(offset) ^(PRB)N_(sc) ^(RB), wherein Δ_(offset)^(PRB) is the offset value of the first frequency domain startingposition, N_(sc) ^(RB) is a number of subcarriers in a physical resourceblock, and k_(TC) ^((p)) is the second frequency domain startingposition; and wherein a transmission bandwidth set of the soundingreference signal is determined according to the second parameterindicating the bandwidth configuration of the sounding reference signal,the transmission bandwidth set comprising: 112, 56, 28, 4; 120, 60, 20,4; 128, 64, 32, 4; 136, 68, 4, 4; 144, 72, 36, 4; 144, 48, 16, 4; 160,80, 40, 4; 160, 80, 20, 4; 168, 84, 28, 4; 176, 88, 44, 4; 192, 96, 48,4; 208, 104, 52, 4; 216, 108, 36, 4; 240, 120, 60, 4; 240, 80, 20, 4;256, 128, 64, 4; and 272, 136, 68, 4; and transmit a signaling messageto a second communication node, wherein the signaling message includesthe first parameter, the second parameter, and the offset value.
 14. Thedevice of claim 13, wherein the second parameter indicating thebandwidth configuration of the sounding reference signal is an integerin a range from 0 to
 63. 15. The device of claim 13, wherein theprocessor executable code upon execution by the processor configures theprocessor to: configure a plurality of resources for the secondcommunication node, wherein the signaling message includes a thirdparameter to allow the second communication node to switch antennasusing the plurality of the resources.
 16. A wireless communicationdevice, comprising: a processor, and a memory including processorexecutable code, wherein the processor executable code upon execution bythe processor configures the processor to: receive a signaling messagetransmitted by a first communication node, wherein the signaling messageincludes a first parameter indicating a bandwidth of a soundingreference signal, a second parameter indicating a bandwidthconfiguration of the sounding reference signal, and an offset value of afirst frequency domain starting position of the sounding referencesignal relative to a second frequency domain starting position, whereinthe first frequency domain starting position is determined based on k ₀^((p))=k_(TC) ^((p))+Δ_(offset) ^(PRB)N_(sc) ^(RB), and whereinΔ_(offset) ^(PRB) is the offset value of the first frequency domainstarting position, N_(sc) ^(RB) is a number of subcarriers in a physicalresource block, and k_(TC) ^((p)) is the second frequency domainstarting position; determine a transmission bandwidth set of thesounding reference signal according to the second parameter indicatingthe bandwidth configuration of the sounding reference signal, whereinthe transmission bandwidth set comprises: 112, 56, 28, 4; 120, 60, 20,4; 128, 64, 32, 4; 136, 68, 4, 4; 144, 72, 36, 4; 144, 48, 16, 4; 160,80, 40, 4; 160, 80, 20, 4; 168, 84, 28, 4; 176, 88, 44, 4; 192, 96, 48,4; 208, 104, 52, 4; 216, 108, 36, 4; 240, 120, 60, 4; 240, 80, 20, 4;256, 128, 64, 4; and 272, 136, 68, determine a resource based on thefirst parameter, the second parameter indicating the transmissionbandwidth set, and the offset value included in the signaling message;and transmit the sounding reference signal using the resource.
 17. Thedevice of claim 16, wherein the second parameter indicating thebandwidth configuration of the sounding reference signal is an integerin a range from 0 to
 63. 18. The device of claim 16, wherein theprocessor executable code upon execution by the processor configures theprocessor to switch antennas using a plurality of resources configuredby the first communication node.